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BECE Science 2022 Paper

Question : 30

Total: 40

An atom

^{23}_{11}\mathrm{X}

Solution:

Concept:

When an atom loses an electron, it becomes a positively charged ion called a cation.

Explanation:

The atom

^{23}_{11}\mathrm{X}

has atomic number

11

, so it contains

11

protons and

11

electrons in its neutral state.

When it loses one electron during bond formation, the number of electrons becomes

11 - 1 = 10

The number of protons remains

11

Net charge on the ion

= 11 - 10 = +1

Therefore, the ion formed is

\mathrm{X}^{+}

Answer:

+1

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