2.2 Bonding

Question 1

Meaning of acidic

Answer 1

Having a pH value less than 7

Question 2

Meaning of alkaline

Answer 2

Having a pH value greater than 7

Question 3

Meaning of ball-and-stick model

Answer 3

A representation of ionic compounds and molecules in which balls represent the atoms or ions, and springs or plastic links represent the chemical bonds

Question 4

Meaning of brittle

Answer 4

When a substance is likely to crack or shatter when hit

Question 5

Meaning of chemical property

Answer 5

A feature of a substance that can only be determined by studying its chemical reactions

Question 6

Meaning of conductor

Answer 6

Able to carry electrical or thermal energy

Question 7

Meaning of covalent bond

Answer 7

A strong force of attraction between the nuclei of two atoms that are sharing one or more pairs of electrons

Question 8

Meaning of delocalised electron

Answer 8

A free electron in a molecule, ion or solid metal that is not part of an individual atom or bond