Chemical Formulae
Authored by Clarice Teoh
Chemistry
8th Grade
Used 37+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
monoatomic element
N2
CO
Kr
O2
2.
MATCH QUESTION
1 min • 1 pt
Match the correct answer.
diatomic molecule of compound
CO
polyatomic molecule of element
O2
diatomic molecule of element
O3
3.
DRAW QUESTION
1 min • 1 pt
What is the total number of atoms in glucose, C6H12O6?
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the total number of elements in iron(III) phosphate, Fe3(PO4)2
3
8
12
13
5.
MATCH QUESTION
1 min • 1 pt
Valency of an element is the number of valence electrons that must be gained, lossed or shared to achieve a complete valence electron shell.
What is the valency of the following elements?
1
Li
2
Ca
2
C
3
N
4
O
6.
MATCH QUESTION
1 min • 1 pt
The ions of transition metals can have more than 1 valency. The valency is indicated using Roman numerals in bracket.
What is the valency of the following ions?
4
silver ion
2
iron(III) ion
3
titanium(IV)
1
copper(II) ion
7.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Valency of a polyatomic ion is the overall charge on the ion.
The valency of ammonium ion, NH4+ is
(a)
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