Electronic configurations and the periodic table
3 marks · EasyConsider the element aluminium, which has atomic number 13.
(a)[1 mark]
Write its electronic configuration.
(b)[1 mark]
State the number of shells occupied by electrons.
(c)[1 mark]
Identify the group number and period number for aluminium.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) 2,8,3
(b) 3
(c) Group 3, Period 3
Also accept: Group III, Period 3 (for c)
Show mark scheme and worked solution
Marking points
A1 (a) · 1 mark · Electronic configuration: 2,8,3.
A2 (b) · 1 mark · Three occupied shells.
A3 (c) · 1 mark · Group 3, Period 3, correctly given. (follow-through)
Worked solution
a) Aluminium: 2,8,3
b) Three occupied shells
c) Group 3, Period 3