Question

Group Activity
Example : Make placards with symbols and valencies of the
elements separately. Each student should hold two
cene with the symbol in the right hand and
the other with the valency in the left hand. Keeping
bolis in place, students should criss-cross their
valencies to form the formula of a compound.
Emple 2 : A low cost model for writing formulae: Take empty
bister packs of medicines. Cut them in groups.
according to the valency of the element, as shown in
heure. Now you can make formulae by fixing one
pe of ion into other.
SO.
PO,
Form for sodium sulphate:
2 sodium ions can be fixed on one sulphate lon.
Hence, the formula will be: Na SO.
Do it yourself
Now. write the formula of sodium phosphate.​

Answer 1

Answer:

bro group activity is done practically not in any app

Answer 2

Answer:

Sodium phosphate monobasic has the chemical formula of NaH2PO4, and the chemical formula of Na2HPO4 has the sodium phosphate dibasic.

Explanation:

formula of sodium phosphat

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