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Atomic/Mass Number
Use a periodic table: What is the name of element #25
What is the name of element #92
Atomic/Mass Number
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periodic table
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1
What is the name of element #92
fluorine
plutonium
radon
uranium
2
Use a periodic table: What is the name of element #25
chromium
magnesium
manganese
iron
3
If you take 2 protons away from element #20, what element will you have?
calcium
argon
titanium
potassium
4
How many neutrons are in element #19
39
20
19
39.10
5
If you add 1 proton to element #17, what element do you have?
chlorine
argon
sulfur
hydrogen
6
What do neutrons do for an atom?
name or identity
add charge
determine protons
add mass
7
How many neutrons are in element #9?
9
10
8
What is the mass number for element #34?
2.4
34
79
78.96
9
How does one calculate number of neutrons?
rounded mass number - protons =
rounded mass number - neutrons =
rounded mass number + protons =
rounded mass number - electrons =
10
How many neutrons are in element #3
3
0
3.94
4
11
What is the mass number for element #82
207
82
1.8
207.20
12
what makes up the mass of an atom?
protons + neutrons
protons alone
protons + electrons
electrons
