2022S - Paper 1 - A Levels

Question 1

This question is about atomic structure and the Periodic Table.

(a) Complete the table to show the relative charges and masses for a neutron and an electron.

Particle	Relative charge	Relative mass
proton	+1	1
neutron	0	1
electron	-1	0

Example of table Particle Relative charge 

Electron 1/1840 Allow negligible / very small or words to that effect / values in a range from 1/1800 to 1/2000 (0.0005) for the relative mass of electron Do not award 0 / none for mass of electron Ignore + sign for neutron

Unit 1 - Relative Mass

Atomic emission spectroscopy provides evidence for the existence of

• atoms
• electrons
• isotopes
• quantum shells

(c) Draw the shape of a p orbital.