Chemical Bonding Quiz

What is the oxidation state of sodium (Na) when it loses its one valence electron to form an ionic bond in sodium chloride (NaCl)?

• 0

• +1

• -1

• +2

How many valence electrons does chlorine (Cl) have?

• 1

• 2

• 6

• 7

What type of charge does a magnesium ion (Mg2+) have after it loses its two valence electrons?

• Negatively charged

• Positively charged

• Neutral

• Variable charge

Which of the following statements correctly describes the electron needs of oxygen (O) and hydrogen (H) in a water molecule (H2O) according to the octet rule?

• Oxygen needs two more electrons and hydrogen needs two more electrons.

• Oxygen needs one more electron and hydrogen needs one more electron.

• Oxygen needs two more electrons and hydrogen needs one more electron.

• Oxygen needs one more electron and hydrogen needs two more electrons.

How many valence electrons does a carbon (C) atom have?

• 2

• 4

• 6

• 8

How many covalent bonds does a hydrogen (H) atom form in methane (CH4)?

• 1

• 2

• 3

• 4

What type of bond is formed when two hydrogen atoms share their single valence electron with oxygen to create a stable electron configuration?

• Ionic bond

• Metallic bond

• Covalent bond

• Hydrogen bond

In the formation of methane (CH4), what rule is followed to complete the valence shell of carbon and hydrogen atoms?

• Duplet rule

• Octet rule

• Sextet rule

• Quartet rule

Which molecule is formed when oxygen shares its electrons with two hydrogen atoms, each sharing its single valence electron?

• Methane (CH4)

• Water (H2O)

• Carbon dioxide (CO2)

• Hydrogen peroxide (H2O2)

Which of the following elements will form an ionic bond with chlorine (Cl) to produce a salt?

• Sodium (Na)

• Carbon (C)

• Oxygen (O)

• Hydrogen (H)