Chapter 2 - Atoms, Ions and Compounds

Question 1

what is the relative mass of an electron

Answer 1

1/1836

Question 2

what is the definition for an isotope?

Answer 2

Isotopes are atoms of the same element that have the same number of protons but a different number of neutrons

Question 3

what is the definition for relative isotopic mass?

Answer 3

The mass of an isotope relative to 1/12th of the mass of an atom of carbon-12

Question 4

what is the definition for relative atomic mass?

Answer 4

The weighted mean mass of one atom of an element relative to 1/12th of the mass of one atom of carbon-12

Question 5

How do you calculate % abundance?

Answer 5

(percentage X abundance) + (percentage X abundance) + … / 100

Question 6

what is a binary compound?

Answer 6

A binary compound is made up of two elements ONLY, e.g. sodium oxide

Question 7

what is a polyatomic ion?

Answer 7

A polyatomic ion is an ion that contains atoms of more than one element bonded together, e.g. hydroxide