Question

Fill in the blanks with sutable words:
1. weight of the element is equal to its ______ expressed in a.m.u.
2. Valency of a metal is the number of electrons______ by a atom during the formation of compound.
3. Metals possess _____ valency.
4. Non-metals have _____ valency.
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Answer 1

Answer:

1. atomic mass

2.

3. primary and secondary. The primary valency is not ionisable while secondary valency is ionisable.

4. five and less then five