Counting Atoms
Authored by Erick Castillo
Science
8th Grade
NGSS covered
Used 2+ times
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28 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
How many different ELEMENTS are present in H2COCH2
How many different ELEMENTS are present in H2COCH2
5
4
3
2
Tags
NGSS.MS-PS1-1
2.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Coefficients in chemical formulas...
Coefficients in chemical formulas...
Multiply just the first atom
Add to the subscripts at the end of the molecule
Multiply elements without subscripts
Multiply EVERYTHING!
Tags
NGSS.MS-PS1-1
3.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
4CF2Cl2
4CF2Cl2
C = 4, F = 4, Cl = 2
C = 1, F = 8, Cl = 8
C = 4, F = 8, Cl = 8
C = 1, F = 4, Cl = 8
Tags
NGSS.MS-PS1-1
4.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
H2SO4
H2SO4
H = 2, S = 4, O = 4
H = 2, S = 1, O = 4
H = 8, S = 4, O = 4
H = 2, SO = 4
Tags
NGSS.MS-PS1-1
5.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
How many different elements are present in this molecule?
3 NH4C2H3O2
15
36
5
4
Tags
NGSS.MS-PS1-1
6.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
A ______ is a number written in front of a chemical formula.
Coefficient
Subscript
Exponent
Coordinator
7.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
How many Hydrogen atoms are in 4H2O?
6
8
2
4
Tags
NGSS.MS-PS1-1
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