Skip to content

Course home

Sign up

2.1 Atomic structure

EasyMediumHard
12345678910111213141516171819
Question 6
H

An element has two isotopes. Why can its relative atomic mass be non-whole?

[1]
A

It is a weighted mean of the isotopes' masses

B

The isotopes have different numbers of protons

C

Each isotope has a mass number that is not whole

D

Its atomic number is a mean of the two isotopes

Markscheme

2.1 Atomic structure Questions

  1. GCSE
  2. /Chemistry
  3. /2.1 Atomic structure

46 exam-style questions on Edexcel GCSE Chemistry 2.1 Atomic structure, covering 2.1.1 Development of the atomic model, 2.1.2 Structure of the atom and subatomic particles, 2.1.3 Mass number, isotopes and relative atomic mass, and 2.1.4 Calculating relative atomic mass from isotopic abundance. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank