Chemistry Year Review

Titanium is in group 4. What period is it in?

• 2

• 3

• 4

• 5

What family is on the far left of the periodic table?

• noble gases

• alkali metals

• transition metals

• actinoids

What element is in period 4, group 2?

• lithium

• potassium

• magnesium

• calcium

• 4

• 12

• 24

• 36

Tags

NGSS.MS-PS1-1

An atom with the electron configuration 2, 8, 2 would be expected to form an ion with a charge of:

• +6

• -6

• +2

• -2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Why do elements form bonds?

• to get a charge

• so they can make friends

• to become stable by getting a full valence shell

• to become stable by increasing their mass

A Bromine ion gains 1 electron, which of the following is the correct symbol for a Bromine ion?

• Br^-1

• Br⁺¹

• Br⁺⁷

• Br^-7

Magnesium bromide is an ionic compound with the chemical formula MgBr₂.  What does the "2" tell you?

• There are 2 bromide ions for every magnesium ion

• Bromide has a 2- charge

• Bromide has a 2+ charge

• There are 2 magnesium ions to every bromide ion

Tags

NGSS.MS-PS1-1

How are covalent bonds explained?

• When one atom takes the other atom's electron

• When the atom shares an electron with an another atom

• When the two nucleus merge

• When the neutrons leave the nucleus

Tags

NGSS.MS-PS1-1

What molecule is this?

• CO

• CO2

• C2O

• C2O2

Tags

NGSS.MS-PS1-1