Understanding Chemical Bonds and Molecules

What is the term used to describe the number of bonds an atom can form?

• Electronegativity

• Ionization

• Affinity

• Valency

How many bonds can an oxygen atom form?

• One

• Three

• Four

• Two

What is the chemical formula for the molecule formed by two oxygen atoms?

• O

• O2

• O4

• O3

Why is N2 considered a stable molecule?

• It has a single bond

• It has a double bond

• It has no bonds

• It has a triple bond

What percentage of the air is made up of N2 molecules?

• 80%

• 100%

• 50%

• 20%

Why can't carbon form a quadruple bond?

• It has too many electrons

• There isn't enough space between atoms

• It lacks electrons

• It forms only single bonds

What is the chemical formula for carbon dioxide?

• CO

• CO2

• C2O

• C2O2

During respiration, what molecules are broken apart in the cells?

• N2 and O2

• O2 and CO2

• H2O and CO2

• Glucose and O2

What is the main product of respiration that is exhaled?

• H2O

• CO2

• N2

• O2

What form does carbon take when it forms a network solid?

• Gas

• Liquid

• Graphite

• Plasma