Science, asked by siyatamanga, 3 months ago

TRINITY SCHOOL MOHAL
UNIT TEST 1
CHEMISTRY
Time : 40 minutes.
CLASS EX
M.M: 20
Q1)(a) Fill in the blanks –
(1) A molecule of alum (K SO..AI:(SO4)3.24H20] contains
atoms of oxygen.
(ii) Atomic number of an element is 9. Its valency is
(iii) The outermost shell around a nucleus cannot have more than
electrons.
(iv) The molecular formula of ammonium sulphate is
(1X4-4)
(b) Write the chemical formula of the following -
Ferrir sulnhate​

Answers

Answered by shivtejzaware64
0

Answer:

like hiiiiiiiiiiiiiiiiiiiiiii

Answered by reenathakurramila
0

Answer:

1)The valency of oxygen is.

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