Exploring Chemical Compounds and Their Formation

What is the octet rule?

• Elements want to have eight bonds with other elements.

• Elements want to have eight protons in their nucleus.

• Elements want to have eight electrons in their valence shell.

• Elements want to have eight neutrons in their nucleus.

Which group of elements is already stable and does not react with other elements?

• Halogens

• Noble gases

• Alkali metals

• Transition metals

What type of bond is formed when elements gain or lose electrons?

• Hydrogen bond

• Ionic bond

• Covalent bond

• Metallic bond

What is the charge on a sodium ion after it loses one electron?

• -2

• +2

• -1

• +1

How many valence electrons does magnesium have?

• 1

• 2

• 3

• 4

What is the chemical formula for the compound formed between magnesium and oxygen?

• MgO

• Mg2O

• MgO2

• Mg2O3

What is the charge on an aluminum ion?

• +4

• +1

• +3

• +2

What type of bond is formed when elements share electrons?

• Hydrogen bond

• Metallic bond

• Covalent bond

• Ionic bond

How many valence electrons does carbon have?

• 2

• 4

• 6

• 8

What type of bond is present in O2 gas?

• Double bond

• Triple bond

• Quadruple bond

• Single bond