Chemistry
Which of the following statements is correct with respect to the elements — Na, Mg, Al, Si, P, S and Cl.
- Each element belongs to the same group.
- Valency of each element is the same.
- Each element belongs to the same period.
- They are all metals.
Periodic Table
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Answer
Each element belongs to the same period
Reason — Period 3, known as short period, contains 8 elements i.e., sodium (Na), magnesium (Mg), aluminium (Al), silicon (Si), phosphorous (P), sulphur (S) and chlorine (Cl).
Each element belongs to different group. Valency of each element is the different. Only Na, Mg, Al are metals. Si is a metalloid. P, S, Cl are non-metals.
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