Forming Ions Worksheet
Explore the process of how atoms gain or lose electrons to form ions, including cations and anions, at a Grade 7 level.
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Forming Ions: Grade 7 Science
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Read each question carefully and answer to the best of your ability. This worksheet will test your understanding of how atoms form ions.
1. An atom that gains or loses electrons is called an .
2. When an atom loses electrons, it forms a positively charged ion called a .
3. When an atom gains electrons, it forms a negatively charged ion called an .
4. Electrons have a charge.
5. Protons have a charge.
1. What is the charge of a neutral atom?
Positive
Negative
Neutral (zero)
Depends on the atom
2. Which subatomic particle is involved in forming ions?
Protons
Neutrons
Electrons
All of the above
1. A cation is a negatively charged ion.
True
False
2. An atom becomes an anion when it gains electrons.
True
False
1. Explain the difference between an atom and an ion.
2. Describe what happens to an atom's charge when it loses electrons.
The diagram below shows a simplified model of an atom. Imagine this atom has 3 protons and 3 electrons.
If this atom loses one electron, what type of ion will it become (cation or anion)? What will its charge be?
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