CAIE A-Level Chemistry AS 1 Atomic Structure Questions
Practise subatomic particles, isotopes, electron arrangements, ionisation energy and atomic or ionic radius using CAIE-style evidence.
- Syllabus
- 2028–2030
- Course
- Chemistry 9701
- Level
- AS
Covered syllabus points
Question 1
The table shows the numbers of protons, neutrons and electrons in four different particles, W, X, Y, and Z.
Which pair represents the atoms of two isotopes of the same element?
A
W and Y
B
W and Z
C
X and Y
D
X and Z
Question 2
Neutrons are passed through an electric field. The mass of one neutron relative to the mass of a atom and any deflection in the electric field is recorded.
Which row is correct?
mass of
neutron
behaviour of beam of
neutrons in an electric field
0
deflected
1
deflected
0
not deflected
1
not deflected
Question 3
Vanadium, niobium and tantalum are metals in the same group of the Periodic Table.
Question (a)
(a)
The shorthand electronic configuration of vanadium in the ground state is .
[ 3 ]
Question (i)
(i)
State what is meant by the term ground state.
[ 1 ]
Question (ii)
(ii)
Show the electronic configuration of vanadium using electrons in boxes notation.
[ 1 ]
Question (iii)
(iii)
Deduce the total number of electrons in the p sub-shells of a vanadium atom.
[ 1 ]
Question (b)
(b)
Pelopium was the suggested name for a new element discovered in a mineral.
Pelopium was later found to be a mixture of niobium, Nb , and tantalum, Ta .
Only one naturally occurring isotope exists for each of Nb and Ta .
[ 2 ]
Question (i)
(i)
Complete Table 1.1.
Table 1.1
[ 2 ]
Question 4
Which statements are correct when referring to the two common isotopes of chlorine?
1 The isotopes have different masses.
2 The isotopes have different numbers of nucleons.
3 The isotopes have the same chemical reactions.
A
1, 2 and 3 are correct
B
1 and 2 only are correct
C
2 and 3 only are correct
D
1 only is correct
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