
Calculating the Mass & Neutrons Practice
Presentation
•
Science, Chemistry
•
8th Grade
•
Easy
Standards-aligned
Tracie Lalonde-Bernal
Used 13+ times
FREE Resource
3 Slides • 11 Questions
1
Calculate the neutrons in an atom
By: Ms. LaLonde-Bernal
2
To calculate the mass of an atom you add the protons and the neutrons.
Atomic mass = protons + neutrons
3
Fill in the Blanks
Calculate the atomic mass for the atom described below. You can use a calculator if you want to.
5 protons + 6 neutrons = atomic mass
Type answer...
4
Fill in the Blanks
Calculate the atomic mass for the atom described below. You can use a calculator if you want to.
6 protons + 6 neutrons = atomic mass
Type answer...
5
Fill in the Blanks
Calculate the atomic mass for the atom described below. You can use a calculator if you want to.
3 protons + 4 neutrons = atomic mass
Type answer...
6
Fill in the Blanks
Calculate the atomic mass for the atom described below. You can use a calculator if you want to.
7 protons + 7 neutrons = atomic mass
Type answer...
7
Fill in the Blanks
Calculate the atomic mass for the atom described below. You can use a calculator if you want to.
11 protons + 12 neutrons = atomic mass
Type answer...
8
Fill in the Blanks
Calculate the atomic mass for the atom described below. You can use a calculator if you want to.
13 protons + 12 neutrons = atomic mass
Type answer...
9
To calculate the number neutrons in an atom. Subtract the number of protons (the atomic number) from the atomic mass (the number of protons + neutrons).
Neutrons = Atomic mass - protons
10
Multiple Choice
How many neutrons are in one atom of the element shown?
ROUND the atomic mass to the nearest whole number.
Example: 26.982 rounds to 27
27
13
26.98
14
11
Multiple Choice
How many neutrons are in one atom of the element shown?
ROUND the atomic mass to the nearest whole number.
Example: 26.982 rounds to 27
30
26
55.847
56
12
Multiple Choice
How many neutrons are in one atom of the element shown?
ROUND the atomic mass to the nearest whole number.
Example: 26.982 rounds to 27
28
57
58.69
31
13
Multiple Choice
How many neutrons are in one atom of the element shown?
ROUND the atomic mass to the nearest whole number.
Example: 26.982 rounds to 27
3
7
4
6.94
14
Multiple Choice
How many neutrons are in one atom of the element shown?
ROUND the atomic mass to the nearest whole number.
Example: 26.982 rounds to 27
26
30
55
55.85
Calculate the neutrons in an atom
By: Ms. LaLonde-Bernal
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