Test Index

BECE Science 2023 Paper

Question : 27

Total: 40

Solution:

Concept:

The loss of electrons forms a positively charged ion called a cation.

Explanation:

An atom that loses electrons becomes positively charged.

The superscript positive charge shows how many electrons were lost.

\mathrm{Ca}^{2+}

has a charge of

+2

, so it lost 2 electrons.

\mathrm{S}^{2-}

and

\mathrm{F}^{-}

are anions that gained electrons, not lost them.

\mathrm{K}^{+}

lost only 1 electron.

Answer:

\mathrm{Ca}^{2+}

Go to Question:

Prev Question

Next Question