Covalent Compounds

What is a covalent bond?

• A bond formed between oppositely charged ions

• A bond formed when two atoms share a pair of electrons

• A bond formed by delocalised electrons

In a dot and cross diagram, what does each dot represent?

• A neutron

• A proton

• An electron

What is the total number of atoms in an CCl₄ molecule?

• 2

• 3

• 4

• 5

What is the greatest number of covalent bonds that one carbon atom can form?

• 1

• 2

• 3

• 4

How many electrons are shared in a double bond?

• 2

• 4

• 6

When a substance made of small molecules boils, what does the energy overcome?

• Intermolecular forces

• Ionic bonds

• Covalent bonds

Which statement best explains why substances made of small molecules cannot conduct electricity?

• They have no charged particles that are free to move from place to place

• They cannot move from place to place

• They have no charged particles

Which statement best explains why diamond has a high melting point?

• It has strong covalent bonds

• A large amount of energy is needed to break its strong covalent bonds

• A large amount of energy is needed to break its bonds

What is triple bond?

• Three electrons shared between two atoms

• Two electrons shared between three atoms

• Three pairs of electrons shared between two atoms

What is the total number of electrons shared in a water molecule?

• 1

• 2

• 3

• 4