Unit 04 Review

Which of the following is the scientific name for LiCl?

Answer explanation

LiCl - ionic (metal & nonmetal)

In an ionic substance the metal keeps its name the nonmetal changes the end to -ide.

Two major categories of chemical compounds are _____ and _____.

• Atomic; synthesis

• Organic; allotropic

• Ionic; covalent

• Main; covalent

Answer explanation

Most chemical compounds that exist are either ionic or covalent.

What is the formula for copper (I) oxide?

Answer explanation

The substance contains Cu⁺¹ and O^-2. To balance the charges it requires 2 Cu atoms for every 1 O atom - so Cu₂O.

Which of the following is the common name for NH₃ ?

• water

• ammonia

• nitric acid

• methane

Tags

NGSS.MS-PS1-1

Which of the following is the metallic ion in sodium fluoride?

• Na ^1-

• Na ¹⁺

• F ^2-

• F ²⁺

Answer explanation

Sodium is Na and in sodium fluoride the ion will have a charge of +1.

What is the formula for sodium fluoride?

Answer explanation

Na would become Na⁺¹.

F would become F^-1.

Since the charges balance (+1 and -1) then the ratio of atoms is 1:1, so NaF.

What is the name for H₂SO₄?

Answer explanation

H₂SO₄ is an acid. SO₄ is the sulfate ion and in an acid the -ate is changed to -ic.

What is the formula for iron (II) oxide?

Answer explanation

Fe⁺² and O^-2 are the ions present. Since the charges balance (+2 and -2) the atoms have a 1:1 ratio.

The formula would be FeO.

What is the correct name for the compound with the formula NH₄NO₂?

Answer explanation

The NH₄⁺¹ ion is ammonium. The NO₂^-1 ion is nitrite.

What is the correct formula for titanium (III) oxide?