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Chemical formula
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Oh no! I don't even remember how to do it
good morning students! Let's have a quick revision on chemical formulas before we move on to the next topic
chemical formulas are so easy, why do we have to revise?
Now I'll choose the student to answer the question on the board because some students only open their books the day before the exam
Find the chemical formula of ammonium sulphate
oh no !
Find the chemical formula of ammonium sulphate
Nisha! please come to the board and answer this question , rest of you put your hands down!
Find the chemical formula of ammonium sulphate
First, write the symbols for each element, then their valency
Please write the answer on the board.
Ma'am I'm not sure how to do it.
yes ma'am.
Find the chemical formula of ammonium sulphate
Ok good job! now go back to your seat .
SYMBOL NH4 So4 VALENCY 1 2
FORMULA (NH4)2 So4
POTASSIUM BROMIDE
WOW! That was so easy, It would've been easier if I had studied
The next question is on the board and this question goes to...…..
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