206.3 amu

207.2 amu

206.8 amu

82.0 amu

15 + 50 + 35 / 3 = Average atomic mass of J

Mass Z + Mass Y + Mass W / 3 = Average atomic mass of J

(Mass Z x 0.15) + (Mass Y x 0.50) + (Mass W x 0.35) = Average atomic mass of J

(Mass Z + 0.15) + (Mass Y + 0.50) + (Mass W +0.35) = Average atomic mass of J

A

B

C

D

The two electrons that the Mg atom loses are gained by the chlorine atoms.

The one electron that the Mg atom loses is gained by the chlorine atom.

The two elements join together in a covalent bond.

The two elements join together in an ionic bond.

The two elements join together in a hydrogen bond.

It represents an element that is classified as a noble gas.

It represents an element that is from the halogen group.

It represents an element that will readily give an electron away.

It represents an element that will readily accept an electron.

It represents an element that is a metal.

This is a group 13 element.

This is a group 17 element.

This element comes from a group that is stable.

This element has three valence electrons.

This element is in period three on the periodic table.

core electrons

valence electrons

protons

all electrons

The mass number determines how the electrons will be arranged.

They illustrate valence electrons with dots.

They represent how valence electrons are distributed around atoms.

The dots represent the protons and neutrons in the nucleus.

All electrons are shown in a Lewis Dot Structure.

Boron

Magnesium

Chlorine

Silicon

79.9 amu

35.0 amu

45.0 amu

80.0 amu

30.7 amu

31.1 amu

33.3 amu

3106. amu

H :O: H

:O: H :O:

:O: H H:

K :I:

hydrochloric acid (HCl): trigonal planar

water (H₂O): trigonal planar

carbon dioxide (CO₂): tetrahedral

methane (CH₄): tetrahedral

carbon tetrachloride (CCl₄): tetrahedral

[Ar] 4s² 3d⁹

[Ne] 3s² 3p⁴

[Ar] 3s² 3p⁴

[Ne] 3s² 3p³

[Ar] 4s² 3d⁶

[Ar] 4s² 4d⁶

[Kr] 4s² 3d⁶

[Kr] 4s² 4d⁶

A chemical reaction occurred, which means the atoms rearranged to form new substances

A chemical reaction occurred, which means even though the old atoms turned into new atoms, they had the same mass

Jay must have made an error in measuring the mass before or after he mixed the liquids

One of his classmates probably did something to affect his experiment

6P + O₂ -------> 3P₂O₅

P₄ + O₂ ------> 2P₂O₅

2P + 2O₂ ------> P₂O₅

4P + 5O₂ ------> 2P₂O₅

Yes, because they are just different pictures

No, because it does not show how you made them react

Yes, because it show that the reactants paired up with different things on the product side

No, because the picture is not a balanced equation.

5 grams

7 grams

17 grams

It is not possible to tell from the data

Physical just changes what it looks like chemical changes how the atoms bond

Physical and chemical changes are the same

Physical is the action of what you do and chemical is what you see the stuff doing

Physical and chemical changes are not related to each other

Test the boiling points

Test the smell

Test the hardness

Test the solubility

The mass of the gummy bear changed from 3.0 grams to 4.0 grams overnight

The gummy bear got bigger and changed color when in the sugar solution overnight

The density of the gummy bear changed from 2.0 g/cm₃ to 2.6 g/cm₃ when it sat in the sugar solution overnight.

The volume of the gummy bear changed from 1.3 cm₃ to 2.1 cm₃ overnight

$$1s^2 2s^2 2p^6 3s^2$$

$$1s^2 2s^2 2p^6 3s^1 3p^1$$

$$1s^2 2s^2 2p^6 3s^2 3p^1$$

$$1s^2 2s^2 2p^6 3s^2 3p^2$$