CBSE Class 10 Science 2022 · Paper 31/6/3 · Question 1
An element ‘X’ is placed in group and period of Modern Periodic Table.
- (a)Identify ‘X’ and name any two members of the same group.
- (b)Write the formula of the oxide of ‘X’.
Answer
X is magnesium; two other group 2 members are beryllium and calcium; the oxide of X is .
(a) X is magnesium, Mg (atomic number , electronic configuration ). Two other members of the same group (group 2): beryllium (Be) and calcium (Ca).
(b) The formula of the oxide of X is .
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