What is a Rubidium ion's symbol?

• Rb^-

• Rb⁺

• Rb_^-2

• Rb⁺²

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Nitrogen will form which of the following ions?

• N

• N^-3

• N^-5

• N⁺⁵

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Beryllium will ____ valence electrons when forming an ionic bond.

• lose 4

• gain 4

• lose 2

• gain 2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

If an atom has 3 valence electrons, what charge will it have as an ion?

• +3

• -3

• +5

• -5

If an element gains 1 electron, what charge will it have?

• +1

• -1

• +7

• -7

Group 17 always has ions with a charge of 

• +1

• +2

• -1

• -2

If an ion has a positive charge you would __________ the charge number from the number of protons to figure out how many electrons there are.

• subtract

• add

• multiply

• divide

What is the correct formula for aluminium oxide? Aluminium is in group 3 and oxygen is in group 6.

• Al₂O₃

• AlO

• AlO₄

• Al₂O

• Al₃O₂

Tags

NGSS.MS-PS1-1

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

Write the formula for barium + nitrogen

• Ba₂N₃

• Ba₃N₂

• BaN

• BaN₃

Tags

NGSS.MS-PS1-1