Writing Equations and Naming Compounds

A group of atoms that acts together as one charged atom in a

• polyatomic ions.

• crystal.

• molecule.

• negative ion.

Ions that are made of more than one atom are examples of

• polyatomic ions.

• neutral ions.

• positive ions.

• negative ions.

In a chemical formula for an ionic compound, which item is written first?

• positive ion

• charge

• subscript

• negative ion

Which of the following correctly shows the formula for a hydrate?

• H₂O

• MgSO4 . 7H2O

• H2O2

• MgSO₄(H₂O)₇

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

• Bromide has a 2- charge.

• Bromide has a 2+ charge.

• There are two bromide ions for every magnesium ion.

• There are two magnesium ions to every bromide ion.

Tags

NGSS.MS-PS1-1

What is the chemical name for the compound with the formula Na₂S?

• sodium fluoride

• sodium sulfide

• lithium oxide

• magnesium sulfide

What is the name of the compound with the formula NaCl?

• sodium chloride

• sodium chlorate

• monosodium monochloride

• chlorine sodiate

How many hydrogen atoms are present in one molecule of ammonium acetate, NH₄C₂H₃O₂?

• 3

• 11

• 7

• 4

What is the total number of atoms in the compound Ca(ClO₃)₂?

• 2

• 9

• 6

• 3

Tags

NGSS.MS-PS1-1

The formula SO₄²- stands for ammonium.

• True

• False