Atomic structure - AQA

1

What is the plum pudding model of the atom?

2

Which scientist found evidence for the existence of neutrons?

3

What is the radius of a typical atom?

4

What is the relative mass and charge of a neutron?

5

An atom has 13 protons and 14 neutrons. What is its mass number?

6

An atom has an atomic number of 9 and a mass number of 19. What are its numbers of protons, neutrons and electrons?

7

What are isotopes?

8

Four atoms have the numbers of protons and neutrons given below. Which two atoms are isotopes of the same element?

W: 8 protons and 8 neutrons

X: 8 protons and 10 neutrons

Y: 10 protons and 8 neutrons

Z: 9 protons and 10 neutrons

9

What is the best definition of the relative atomic mass of an element?

10

A sample of naturally occurring neon is 91% neon-20 and 9% neon-22. What is its relative atomic mass?