Chapter 2 Keywords

Question 1

Atomic number

Answer 1

The number of protons. Also known as proton number

Question 2

Isotope

Answer 2

Different forms of the same element only in the number of neutrons. They have the same number of protons and electrons

Question 3

Cation

Answer 3

Positive ions with fewer electrons than protons

Question 4

Anions

Answer 4

Negative ions with more electrons than protons

Question 5

Relative isotopic mass

Answer 5

Mass of an isotope relative to 1/12th mass of an atom of carbon 12

Question 6

Relative atomic mass

Answer 6

Weighted average mass of an atom relative to 1/12th mass of an atom of carbon 12

Question 7

Binary compound

Answer 7

Contains two elements only. 2nd element ends with -ide

Question 8

Polyatomic ion

Answer 8

Ion containing atoms if more than one element bonded together

Question 9

Relative molecular mass

Answer 9

Used for small molecules

Question 10

Relative formula mass

Answer 10

Used for compounds with giant structures