Covalent Bonding and Electron Sharing in Non-Metal Atoms

Audrey Poulton introduces covalent bonding in a grade 8 physical science lesson. The lesson covers the relationship between element groups in the periodic table and their bonding capacity, focusing on covalent bonds formed by non-metal atoms sharing electrons. Examples include hydrogen, oxygen, nitrogen, water, methane, ammonia, and carbon dioxide. The lesson concludes with a summary of key points.

What is the main goal of covalent bonding as discussed in the lesson?

• To achieve a full outer shell of electrons

• To decrease the atomic mass

• To change the element's group in the periodic table

• To increase the atomic number

Which group of elements is known for having a full valence shell naturally?

• Group 6

• Group 8

• Group 4

• Group 1

How many bonds can a Group 4 element typically form?

• 4 bonds

• 3 bonds

• 2 bonds

• 1 bond

Covalent bonds are formed between which types of atoms?

• Metal atoms

• Non-metal atoms

• Metal and non-metal atoms

• Noble gases

In a hydrogen molecule (H2), how many electrons are shared between the atoms?

• 2 electrons

• 4 electrons

• 1 electron

• 3 electrons

What type of bond is formed in an oxygen molecule (O2)?

• Single bond

• Triple bond

• Quadruple bond

• Double bond

How many pairs of electrons are shared in a nitrogen molecule (N2)?

• 4 pairs

• 3 pairs

• 2 pairs

• 1 pair

In a water molecule (H2O), how many hydrogen atoms are bonded to one oxygen atom?

• 3 hydrogen atoms

• 1 hydrogen atom

• 4 hydrogen atoms

• 2 hydrogen atoms

What is the molecular formula for methane?

• CH3

• CH4

• C2H6

• C2H4

In carbon dioxide (CO2), how many double bonds are formed between carbon and oxygen?

• 1 double bond

• 2 double bonds

• 4 double bonds

• 3 double bonds