7 grade valency
Authored by kalauova baktugul
Chemistry
7th Grade
NGSS covered
Used 246+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
what is the formula of aluminium
oxide?
Al2O3
AlO
Al2O5
Al3O2
2.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
chemical formula of Magnesium oxide
MgO
Mg1O1
Mg2O2
MgO2
3.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
In CuO (Copper Oxide), valency of Copper is
I
II
III
IV
Tags
NGSS.HS-PS1-2
4.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
What is the chemical formula for calcium nitride CaхNy (N- III) ?
Ca3N2
Ca2N3
CaN
Ca3N
Tags
NGSS.HS-PS1-1
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Shows the number of atoms in the molecule
coefficient
subscript
valency
atomic number
Tags
NGSS.MS-PS1-1
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Calculate the relative molecular mass of calcium hydrxide Ca(OH)2?
84
58
74
100
7.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Use the Periodic Table to find the atomic mass of chlorine element
17
35
35,5
7
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