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Atomic structure

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Question 22

The table shows the numbers of protons, neutrons and electrons in some atoms and ions.

Atom or ionProtonsNeutronsElectrons
P666
Q151618
R777
S686
T121210
a.

(i) Which statement about subatomic particles is correct?

  • A Protons and neutrons have almost the same mass.
  • B Electrons and protons have almost the same mass.
  • C Neutrons and electrons have almost the same mass.
  • D Protons, neutrons and electrons all have the same mass.
[1]
b.

(ii) What is the atomic number of Q?

  • A 15
  • B 16
  • C 18
  • D 31
[1]
c.

(iii) What is the mass number of S?

  • A 6
  • B 8
  • C 12
  • D 14
[1]
d.

Which group of the Periodic Table contains element R?

[1]
e.

(i) Which two letters represent isotopes of the same element?

[1]
f.

(ii) Which letter represents a positive ion?

[1]
g.

The diagram shows the arrangement of particles in another ion.

A simplified schematic of an ion showing a central nucleus containing 1 proton and 2 neutrons, and a single electron shell containing 2 electrons.

How does the diagram show that this ion has a negative charge?

[1]

Atomic structure Questions

  1. IGCSE
  2. /Chemistry
  3. /Atomic structure