Electron Arrangements Worksheet
Explore the basic concepts of electron shells, valence electrons, and their importance in chemical bonding for Grade 7 Science.
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Electron Arrangements Worksheet
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Date:
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Read each question carefully and answer to the best of your knowledge. Refer to your notes or textbook if needed.
1. What are the three main subatomic particles found in an atom?
2. Which of these particles are involved in chemical bonding?
3. The maximum number of electrons that can be held in the first electron shell is:
1
2
8
18
4. The outermost electron shell of an atom is called the:
inner shell
valence shell
electron cloud
nucleus
5. Electrons are arranged in specific energy levels or around the nucleus.
6. Atoms with a full outer shell of electrons are considered to be very .
7. All electrons in an atom are involved in forming chemical bonds.
True
False
8. The Bohr model of the atom shows electrons orbiting the nucleus in fixed paths.
True
False
9. Observe the Bohr model of an atom below. How many valence electrons does this atom have?
10. Explain why atoms tend to gain, lose, or share electrons.
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