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Question
The electronic configuration of an element T is 2, 8, 8, 1.
- What is the group number of T?
- What is the period number of T?
- How many valence electrons are there in an atom of T?
- What is the valency of T?
- Is it a metal or a non-metal?
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Solution
- Group 1 since the valence electron is 1.
- With 4 shells T belong to period 4.
- It has one electron in the outermost orbit. So there is only one valence electron.
- T needs to lose one electron to complete its octet; hence, its valency is 1.
- Since it has one valence electron, it is a metal.
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