Quiz on Atoms and Chemical Compounds

When atoms combine, what do they form?

• Ions

• Elements

• Molecules

• Mixtures

Molecules can be classified as:

• Cations or Anions

• Diatomic or Polyatomic

• Simple or Complex

• Neutral or Charged

An electron located in the outermost shell of an atom is called a/an:

• Core electron

• Valence electron

• Inner electron

• Orbital electron

What is the net charge of a neutral atom?

• Positive

• Negative

• Zero

• Depends on the element

An atom or group of atoms with a net positive or negative charge is called a/an:

• Molecule

• Isotope

• Ion

• Element

A positively-charged ion is known as a:

• Anion

• Cation

• Neutral atom

• Radical

If a potassium atom (K) loses one electron, what is the formula for the resulting ion?

• K−

• K2+

• K+

• K

A negatively-charged ion is known as a/an:

• Cation

• Anion

• Isotope

• Neutral atom

When a fluorine atom (F) gains an electron, it becomes a fluoride ion. What is its net charge?

• +1

• +2

• -1

• -2

Which type of formula shows the simplest whole number ratio of atoms in a compound?

• Molecular Formula

• Structural Formula

• Empirical Formula

• Condensed Formula