CBSE Class 10 Science 2019 · Paper 31/1/1 · Question 3(b)
The electronic configuration of an element is 2, 8, 4. State its :
- (a)group and period in the Modern Periodic Table.
- (b)name and write its one physical property.
Answer
Group 14, period 3; the element is silicon, a poor conductor of electricity (a semiconductor).
(a) Group 14 and period 3.
(b) The element is silicon (Si). One physical property: it is a poor conductor of electricity compared with metals (a semiconductor); another correct physical property, such as its being a hard, brittle solid, is equally acceptable.
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