AS CHEMISTRY ionisation energy multiple choice question help?

9

In which one of the following pairs is the first ionisation energy of element Y greater than that of element X? (Total 1 mark)

electronic configuration of: element X element Y
A 1s1 ls2
B 1s2 2s2 ls22s2 2p1
C 1s2 2s22p3 ls22s22p4
D 1s2 2s22p6 ls22s22p6 3s1

The answer is A but idek how?
Help is much appreciated :smile:

(edited 7 years ago)

Reply 1

Sakura-Sama

OP

9

bump

Reply 2

charco

Study Forum Helper

18

Original post by Sakura-Sama

In which one of the following pairs is the first ionisation energy of element Y greater than that of element X? (Total 1 mark)

electronic configuration of: element X element Y
A 1s1 ls2
B 1s2 2s2 ls22s2 2p1
C 1s2 2s22p3 ls22s22p4
D 1s2 2s22p6 ls22s22p6 3s1

The answer is A but idek how?
Help is much appreciated :smile:

Double the nuclear charge acting on electrons in the same shell.

Reply 3

toeissacutie

1

Original post by Sakura-Sama

In which one of the following pairs is the first ionisation energy of element Y greater than that of element X? (Total 1 mark)

electronic configuration of: element X element Y
A 1s1 ls2
B 1s2 2s2 ls22s2 2p1
C 1s2 2s22p3 ls22s22p4
D 1s2 2s22p6 ls22s22p6 3s1

The answer is A but idek how?
Help is much appreciated :smile:

Can u share the markscheme

AS CHEMISTRY ionisation energy multiple choice question help?

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