Question

1. What is a symbol ? What information does it come?
2. Why is the symbol Sfor sulphur, but Na for sodium and se
for silcon
3. Write the full form of IUPAC Name the elements
represented by the following symbols:
Au. Pb, Sn. Hg.
4. If the symbol for Cobalt. Co. were wrimen as CO. what
would be wrong with it?
5. What do the following symbols stand for?
(a) H (b) H, (C) 2H (22H,
6. What is meant by atomicity ? Name a diatomic element
7. (a) Explain the terms valency and variable valency
(b) How are the elements with variable valency named?
Explain with an example.
8. Give the formula and valency of :
(a) aluminate
(b) chromate​

Answer 1

Answer:

1 A symbol is a short form which stands for the atom of a specific element

It represent a specific element

It represent one atom of an element

3 IUPSC -International union of pure and applied chemistry

Answer 2

Answer:

What is a symbol? What information does it convey