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.
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.
Related Questions
The number of elements in the largest period of the periodic table is:
- 18
- 8
- 32
- 42
All the members of group 15 have ……………. electrons in their outermost orbit.
- 3
- 7
- 5
- 8
Elements with 2 electrons in their outermost shells are known as :
- Alkali metals
- Halogens
- Alkaline earth metals
- Inert gases
Elements which have their outermost orbits incomplete are:
- Transition elements
- Noble gases
- Inner transition elements
- Representative elements