Question

A.
1. An element 'X' has six electrons in its outer or valence shell.
Its valency is__________
[+2/-2/-1]
2. An element 'Y' has electronic configuration 2,8,6.
The element 'Y' is a________
[metal/non-metal/noble gas).
3. A_______
(proton/neutron] is a sub-atomic particle with no charge and unit mas
4. An element Z with zero valency is__________ a [metal/noble gas/non-metal].
5. Magnesium atom with electronic configuration 2, 8, 2 achieves stable ele
configuration by losing two electrons, thereby achieving stable electronic configura
the nearest noble
gas_____________
[neon/argon)​

Answer 1

Explanation:

1 -2

2 Non metal

3 neutron

4 noble gas

5 neon