Answer the following questions regarding element X whose atomic number is 15:
a) What is its electronic configuration?
b) To which group does it belong?
c) To which period does it belong?
d) What is its valency?
e) Is it a metal or a non metal?
f) What is the formula of its compound with
sodium?
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Answer:1. Phosphorus = 1s2 2s2 2p6 3s2 3p3
2. It belongs to 15 group
3. Period =3
4. Valency =4or5
5. Phosphorus is a non metal
6. Na3PO4
Explanation:
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