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Atomic structure

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Question 23

The table below shows the numbers of subatomic particles in two atoms of the same element, Atom X and Atom Y.

Atom XAtom Y
Number of electrons88
Number of neutrons810
Number of protons88
a.

Which particles are present in the nuclei of both atoms?

  • A electrons and neutrons
  • B electrons and protons
  • C neutrons and protons
  • D neutrons, protons, and electrons
[1]
b.

The atomic number of atom Y is __________.

[1]
c.

The mass number of atom Y is __________.

[1]
d.

Atoms X and Y are electrically neutral because

  • A the numbers of electrons and neutrons are equal
  • B the numbers of electrons and protons are equal
  • C the numbers of neutrons and protons are equal
  • D the numbers of electrons, neutrons, and protons are equal
[1]
e.

Use information from the table to explain why atoms X and Y are isotopes of the same element.

[2]
f.

The electronic configuration of atom X is

  • A 2, 6
  • B 2, 8
  • C 2, 4, 2
  • D 6, 2
[1]

Atomic structure Questions

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