Please help me understand this!!!! "Drag and drop each element symbol to its correct location on the dichotomous key".

Symbols

Br Li As Ca Sb Mg Mn V Na K Sc I S Y

Answers

Answer 1

Answer:

1. Conductors (Yes) : Li, Ca, Mg, Mn, V, Sc, Y, Na, K

a) Energy level 2 = Li

b) Energy level 3: Na, Mg

b. (i) One valence electron = Na

b. (ii) Two valence electrons = Mg

2. Conductors (No) : Br, I, S, As, Sb

a) Energy level 3 = S

b) Energy level 4: Br, As

b. (i) Seven valence electrons = Br

b. (ii)Five valence electrons = As

Explanation:

Conductors are elements which are able to conduct heat and electricity easily. They are usually metallic elements.

From the list of elements, the metals are: Li, Ca, Mg, Mn, V, Sc, Y, Na, K.

From the list of conductors, Li alone has the energy level of 2.

Na and Mg both have energy level of 3 but Na has one valence electron while Mg has two.

Non-conductors or poor conductors do not allow either heat or electricity to pass through them easily. They are usually the non-metals and semimetals or metalloids.

From the list of elements, the poor conductors are: Br, I, S, As, Sb

Only the element S, has an energy level of 3. Both Br and As have energy levels of 4 each. However, Br has seven valence electrons while As has five valence electrons.

The elements identified can be used to fill the dichotomous key attached below.

Please Help Me Understand This!!!! "Drag And Drop Each Element Symbol To Its Correct Location On The

Related Questions

Formula for diphosphorus decoxide ? And explain

Answers

Answer:

It can be represented using the chemical formula P 20 5.It has a molecular weight of 141.945 grams per mole and its density is about 2.39 G/cm 3.It can also be termed as Diphosphorus Pentoxide, Phosphorus(V) Oxide,

Phosphoric Anhydride, Tetraphosphorus Decaoxide, Tetraphosphorus Decoxide.

You add 0.300 moles of an acid to enough water to get a total of 0.500 liters of solution. Your molar concentration is?

Answers

.3/.5 is .6 M. Hope that helped.

The elements least likely to form bonds are found in which group?
15
16
ОО
17
18

Answers

Answer:

Group 18

Explanation:

What is the molarity of a solution that contains 2.14 moles (CH3)2SO in 2.00 L solution?

Answers

Answer:

1.07 M

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Chemistry

Atomic Structure

Molarity = moles of solute / liters of solutionExplanation:

Step 1: Define

[Given] 2.14 moles (CH₃)₂SO

[Given] 2.00 L

[Solve] Molarity

Step 2: Solve

Substitute in variables [Molarity]:                                                                    x M = 2.14 moles (CH₃)₂SO / 2.00 L solution[Molarity] Divide:                                                                                               x = 1.07 M

If 85.6 grams of water are produced by the reaction then how many grams of calcium hydroxide did you start with?

Answers

Answer:

I think it would double it's self

Please help! Will give brainliest

Answers

Answer:

Letter C is the answer Hope it helps!

how many lone pairs are on the central atom in GeH4?

Answers

It shouldn't have any lone pairs since it is a tetrahedral structure. Ge has 4 valence electrons. Each H has 1 valence electron. Therefore, each H valence electron will pair with each valence electron on Ge.

During the intrusion of the Palisades Sill, contact metamorphism changed sandstone and shale into?
a) diorite
b) marble
c) limestone
d) hornfels

Answers

Answer:

i believe it's c but I'm not one hundred percent sure

Explanation:

An earthquake creates a type of wave that shakes the ground. If a large earthquake occurs in Greece, how can the waves be felt across the sea in Italy?


A.
Waves can be transformed into strong winds that travel across the sea.
B.
Waves do not travel through water, but they can crash the sea into land far away.
C.
Waves can cause a series of earthquakes around the world.
D.
Waves can travel through different media including solid land and water.

Answers

A. Waves can be transformed into strong winds that travel across the sea.
The answer is d I hope it helps My friend Message Me if I’m wrong and I’ll change My answer and fix it for you

most bones are connected at Joints by​

Answers

Answer:

Los huesos se mantienen unidos a otros huesos a través de unas largas tiras fibrosas llamadas ligamentos. El cartílago, una sustancia flexible y elástica que contienen las articulaciones, sujeta los huesos y los protege en los puntos donde varios huesos friccionan entre sí.

Take your time please.​

Answers

Answer:

1.) Eyewash station --> D

2.) Absorbent material --> G

3.) Fire extinguisher --> F

4.) Safety Shower --> E

5.) Biohazard container --> J

6.) Broken glass container --> I

7.) Safety goggles --> C

8.) Lab apron --> H

9.) asbestos gloves --> A

10.) Latex gloves --> B

Explanation:

In an equipped laboratory, alot of safety equipments are made available and kept in area that it could be easily accessed in the laboratory. Safety or protective equipments are those materials that helps protect a laboratory personnel while at work on the lab.

These equipments include:

--> Eyewash station: This is an equipment used in the laboratory during emergency to rinse chemical from the eye. Therefore option D is correct.

--> Absorbent material: They are used to contain small spills in the laboratory. Therefore option G is correct.

--> Fire extinguisher: This equipment is used to put out small fires. Therefore F is correct.

--> Safety Shower: This is used to rinse away chemical from clothes and on skin during emergency. Therefore option E is correct.

--> Biohazard container: This container is used to safely dispose bacteria culture, blood and other living tissues. Therefore option J is correct.

--> Broken glass container: This is used to dispose cracked, chipped or broken bottle in the laboratory. Therefore option I is correct.

--> Safety goggles: This helps to protect the eye from chemical and broken glasses. Therefore option C is correct.

--> Lab apron: This is worn by the laboratory personnel to help protect the skin from chemical and biohazards. Therefore option H is correct.

--> Asbestos gloves: these are heat resistant gloves used to protect the hands from heat. Therefore option A is correct.

--> Latex gloves: these are equally worn by the laboratory personnel to protect the hands from chemicals and biohazards

[tex]Answer :—✔[/tex]

THE OTHER PERSON GAVE THE CORRECT ANSWER

chemical energy comes from...

1. chemical change
2. physical change

Answers

Answer:

1

Explanation:

Physical change does not cause chemical energy.

Chemical change Yw btw

3- Write the chemical formula of Alanine and find to which food category it belongs.

Answers

Answer:

C3H7NO2

Explanation:

The chemical formula of Alanine is C3H7NO2 and it belongs to almost all food category because it is present in one food of each food category such as dairy products, meat, nuts, soy, and whole grains etc. Alanine is a nonessential amino acid means that it does not directly obtained from the diet but it can be produced by the body using raw materials present in the food.

In the reaction, 2H2(g) + O2(g)
which the reactants appear is:
2H2O(1), the phase of matter in
a) solid.
b) liquid.
c) gas.
d) plasma.

Answers

Answer:

b liquid

Explanation:

2H

2

(g)+O

2

(g)⟶2H

2

O(l) is the correction reaction as during formation of water both hydrogen and oxygen are in gaseous form and produces water in liquid form.

4 NH3 +5 02 +4NO + 6H2O
When 70.25 grams of NH3 react, how many moles of H20 are produced?

Answers

Answer:

6.19 mol H₂O

Explanation:

4 NH₃ + 5O₂ → 4NO + 6H₂O

First, we convert 70.25 grams of NH₃ into moles, using its molar mass:

70.25 g ÷ 17 g/mol = 4.13 mol NH₃

Then we convert 4.13 moles of NH₃ into moles of H₂O, using the stoichiometric coefficients of the balanced reaction:

4.13 mol NH₃ * [tex]\frac{6molH_2O}{4molNH_3}[/tex] = 6.19 mol H₂O

Fill in the blanks to complete each statement about the heating of Earth's surface
Earth takes in thermal energy from the Sun in a process called blank.
Sunlight strikes Earth's surface at different angles. This angle is called the angle of blank

Answers

Answer: Absorption and insolation

Explanation:

Answer:

what the person above said

is Pb --> PbSO4 reduction half reaction?​

Answers

Answer:

No its is the oxidation half

Explanation:

Because Pb lost [tex]2e^{-}[/tex]

and oxidation is losing, I abbreviate it in (OIL) not oil that used in kitchen

OIL=Oxidation Is Losing electrons

If it takes 75.0 mL of 1.5 M HNO3 solution to completely neutralize 125 mL of Ca(OH)2, what is the concentration of the Ca(OH)2 solution?

Answers

Answer:

0.45 M

Explanation:

The reaction that takes place is:

2HNO₃ + Ca(OH)₂ → Ca(NO₃)₂ + 2H₂O

First we calculate how many HNO₃ moles reacted, using the given concentration and volume:

75.0 mL * 1.5 M = 112.5 mmol HNO₃

Then we convert HNO₃ moles into Ca(OH)₂ moles, using the stoichiometric coefficients:

112.5 mmol HNO₃ * [tex]\frac{1mmolCa(OH)_2}{2mmolHNO_3}[/tex] = 56.25 mmol Ca(OH)₂

Finally we calculate the concentration of the Ca(OH)₂ solution:

56.25 mmol Ca(OH)₂ / 125 mL = 0.45 M

If a ball rolling down a hill is half way between the top and bottom, how much potential energy does the ball have compared to kinetic energy?

Answers

Answer:

The gravitational potential energy and kinetic energy of this ball should be equal (assuming that there is no energy loss due to friction.)

Explanation:

The ball loses gravitational potential energy as it rolls down the hill. At the same time, the speed of the ball increases, such that the ball gains kinetic energy.

If there is no friction on this ball (and that the ball did not deshape,) all the gravitational potential energy that this ball lost would be converted to kinetic energy.

If the gravitational field strength [tex]g[/tex] is constant throughout, the gravitational potential energy of an object in that gravitational field would be proportional to its height.

If [tex]m[/tex] denote the mass of this ball, the gravitational potential energy ([tex]\rm GPE[/tex]) of this ball at height [tex]h[/tex] would be [tex]{\rm GPE} = (m \cdot g) \cdot h[/tex], which is proportional to [tex]h\![/tex].

The value of [tex]g[/tex] near the surface of the earth is indeed approximately constant (typically [tex]g \approx 9.8\; \rm m \cdot s^{-2}[/tex].)

At halfway between the top and bottom of this hill, the height of this ball would be [tex](1/2)[/tex] of its initial value (the value when the ball was at the top of the hill.) Because the [tex]\rm GPE[/tex] of this ball is proportional to its height, at halfway down the hill, the [tex]\rm GPE\![/tex] of this ball would also be [tex](1/2)\![/tex] its initial value.

However, if there was no friction on this ball (and that the ball did not deshape,) that [tex](1/2)[/tex] of the initial [tex]\rm GPE\![/tex] of this ball was not lost. Rather, these [tex](1/2)\![/tex] of the initial [tex]\rm GPE[/tex] would have been converted to the kinetic energy ([tex]\rm KE[/tex]) of this ball.

Hence, when the ball is halfway down the hill:

[tex]\displaystyle \text{GPE halfway down the hill} = \frac{1}{2}\, \text{Initial GPE}[/tex].

[tex]\begin{aligned}& \text{KE halfway down the hill}\\ &= \text{Initial GPE} - \text{GPE halfway down the hill}\\ &= \text{Initial GPE} - \frac{1}{2}\, \text{initial GPE}\\ &= \frac{1}{2}\, \text{Initial GPE}\end{aligned}[/tex].

Therefore:

[tex]\begin{aligned}& \text{GPE halfway down the hill} \\ &= \frac{1}{2}\, \text{Initial GPE} \\ &= \text{KE halfway down the hill}\end{aligned}[/tex].

In other words, under these assumptions, when this ball is halfway down the hill, the gravitational potential energy and the kinetic energy of this ball would be equal.

Which sentences describe decomposers in a food chain?
They are the final link in the energy flow in a food chain or a food web. They are fungi and animals that feed on dead organic matter. Plants
produce food or energy from raw materials. Plants are also known as autotrophs because they can produce organic compounds from inorganic
chemicals. Bacteria, fungi, worms, and snails recycle the garbage of dead matter and give back nutrients into the ecosystem.

Answers

Answer:

hey are the final link in the energy flow in a food chain or a food web. They are fungi and animals that feed on dead organic mattet.

Explanaticuz im naruto uzamaki

1. What is the relationship between a DNA molecule, a gene and a protein?

Answers

Explanation:

for example, one gene will code for the protein insulin, which is important role in helping your body to control the amount of sugar in your blood. Genes are the basic unit of genetics. Human beings have 20,000 to 25,000 genes.

PLEASE HELP! How does one determine how much of a molecule is produced in a reaction?
A. The mass of the products is determined by adding the mass of the
reactants.
B. Oxidation states are used to calculate the number of product
molecules.
C. The coefficients and molar masses are used to calculate amounts
of molecules.
D. The molar masses of the molecules tell how many grams of
product will form.

Answers

I believe the answer is C !

How much Oxygen would be required to react with 101 g of Methane?
A.101 g
B.202 g
C.303 g
D.404 g

Answers

Answer:

404g

Explanation:

21.Total mass of reactants always equals the total mass of the products true or false

Answers

Answer:

True

Explanation:

because its the law of conservation of mass

Which characteristic is a property of water

Answers

It is made of polar molecules

do you think hunter-gatherers are still around today? what makes you think that?​

Answers

Answer:

yes

Explanation:

some cultures in Tanzania are still follow the old ways

A student performed a similar experiment we have done, with Ag and O to produce silver oxide.
Mass of crucible and lid: 29.307 g
Mass of crucible, lid, and silver: 30.958 g
Mass of crucible, lid, and silver oxide: 31.080 g
Use the above data to calculate the moles of the metal used in this experiment. your answer must include correct significant figures and unit.

Answers

Answer:

0.0153 mol

Explanation:

Mass of crucible and lid: 29.307 g

Mass of crucible, lid, and silver: 30.958 g

Number of moles = Mass /Molar mass

Mass of Silver = Mass of crucible, lid, and silver  -  Mass of crucible and lid

Mass of siilver = 30.958 g - 29.307 g

Mass of silver = 1.651 g

Molar mass of silver = 107.868 g/mol

Number of moles = 1.651 g / 107.868 g/mol

Number of moles = 0.0153 mol

Why is the law of conservation of mass law and not a theory?

Answers

Answer:

In physics and chemistry, the law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed.

Explanation:

That is what I think on the subject

A law is more specific, such as this particular description of matter, whereas a theory can be more general and often includes more of a why. Atomic Theory explains why the law of conservation of matter exists; in chemical reactions, atoms simply rearrange and have the same mass before and after.

What is a theory?

A theory is a well-thought-out elaboration for natural-world anecdotes that has been built using the methodological approach and incorporates many facts and hypotheses.

A scientific law, in overall, is a description of an observed phenomenon. It does not explain why or what causes the phenomenon.

A scientific theory is an explanation for a concept. It is a common misconception that with enough research, theories can become laws.

A law is more precise, such as this detailed definition of matter, whereas a theory is more general and frequently includes more of a why.

Atomic Theory explains why the law of conservation of matter exists; atoms simply rearrange and have the same mass before and after chemical reactions.

Thus, that's why, the law of conservation of mass law and not a theory.

For more details regarding law of conservation of mass, visit:

https://brainly.com/question/13383562

#SPJ2

50 POINTS!! PLZ HELP! SCIENCE QUESTION!

Answers

Answer:

C im pretty sure

Explanation:

Because it is facing the opposite direction with opposite colors.

100% C. Hope this helped:)

How could a solid result from the mixing of two liquids?

Answers

Answer:

Combining the two clear colorless liquids is a chemical change because a different solid substance is formed. Tell students that a precipitate is an insoluble solid that forms when two solutions are combined and react chemically. Insoluble means that the solid will not dissolve.

Explanation:

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