WorksheetsCounting Atoms
Total questions: 35
Worksheet time: 23mins
How many Hydrogen atoms are in 4H2O?
6
8
2
How many Oxygen atoms are in H2O?
1
2
0
4
How many Magnesium atoms are in 10MgCl2?
10
5
20
How many atoms are there TOTAL in H2SO4 ?
6
5
7
3
How many Sodium atoms are in 6NaCl?
1
12
6
How many atoms of Hydrogen are in this compound?
1
2
3
4
How many Oxygen atoms are in Al₂(SO₄)₃?
4
12
7
24
A subscript is the small number below the element symbol that tells the number of _______ of that element.
atoms
valence electrons
protons
How many Nitrogen atoms are in the in H2C3O4N5?
2
3
5
How many atoms of carbon (C) are in C6H12O6?
3
6
12
How many elements are present in this compound? (Careful!)
Mg2As3COHNi2
2
4
6
10
Are there any compounds on the periodic table?
yes there are many
no because only elements are on the periodic table
I think they are?
H2SO4
H = 2, S = 4, O = 4
H = 2, S = 1, O = 4
H = 8, S = 4, O = 4
What is the smallest piece of matter that still has properties of that matter?
element
atom
proton
Negatively charged particle
proton
neutron
electron
Neutral charge particle
proton
neutron
electron
Positively charge particle
proton
neutron
electron
The central region of an atom where its neutrons and protons are is its
nucleus
electron cloud
core
What does the 1.00794 stand for?
mass number
atomic number
average atomic mass
number of protons
If the mass number of this chlorine atom is 36, how many neutrons does it have?
17
18
19
can't be determined
What is the atomic number of this atom shown in the Bohr model?
11
12
13
can't be determined
What is the mass number of the atom shown in the Bohr model?
11
12
23
Can't be determined
Beryllium has how many protons?
4
9.0122
2
How many valence electrons does carbon have?
4
5
6
7
