Definitions

Question 1

What is an alkali

Answer 1

A soluble base that gives free hydrogen ions in a solution

Question 2

What is a base

Answer 2

Compound that neutralises an acid

Question 3

Salt

Answer 3

An ionic compound formed when the hydrogen of an atom is replaced by a metal ion

Question 4

Ph

Answer 4

Potential hydrogen

Question 5

Define an acid

Answer 5

A compound containing hydrogen that produces free h+ ions in a solution

Question 6

Pure substance

Answer 6

Composed of only one type of atom.

Question 7

Impure substance

Answer 7

Made of mixtures of elements, mixtures of compounds or mixtures

Question 8

Element

Answer 8

A pure substance that cannot be simplified. They are made up of only one type of atom

Question 9

Compound

Answer 9

A pure substance that can be simplified. Made up of two or more atoms chemically bonded in a fixed ratio

Question 10

Mixture

Answer 10

Consists of a number of compounds. They are impure and not chemically joined in a fixed ratio

Question 11

Particle theory of matter

Answer 11

All matter consists of many small particles that are in a continual state of motion. The degree to which the particles move is determined by the amount of energy they have

Question 12

Covalent bond

Answer 12

When elements share electrons to gain full valence shells

Form between elements that are close together and on the right hand side of the periodic table

Question 13

Ionic bond

Answer 13

The complete transfer of valence electrons between atoms