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20 terms

Elements 1-20, with Protons, Electrons, Neutrons, and Atomic Mass

The title describes it all! Maybe using the test isn't such a great idea, but hey, do what you want!
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Calcium
Ca
#20
20 protons + electrons
20 neutrons
40.1 is the atomic mass
Argon
Ar
#18
18 protons + electrons
22 neutrons
39.9 (rounds to 40) is the atomic mass
Sulfur
S
#16
16 protons + electrons
16 neutrons
32.1 is the atomic mass
Silicon
Si
#14
14 protons + electrons
14 neutrons
28.1 is the atomic mass
Magnesium
Mg
#12
12 protons + electrons
12 neutrons
24.3 is the atomic mass
Neon
Ne
#10
10 protons + electrons
10 neutrons
20.2 is the atomic mass
Oxygen
O
#8
8 protons + electrons
8 neutrons
15.9 is the atomic mass
Carbon
C
#6
6 protons + electrons
6 neutrons
12.0 is the atomic mass
Beryllium
Be
#4
4 protons + electrons
5 neutrons
9.0 is the atomic mass
Helium
He
#2
2 protons + electrons
2 neutrons
4.0 is the atomic mass
Hydrogen
H
#1
1 proton + electron
0 neutrons
1.0 is the atomic mass
Lithium
Li
#3
3 protons + electrons
4 neutrons
6.9 (rounds up to 7) is the atomic mass
Boron
B
#5
5 protons + electrons
6 neutrons
10.8 (rounds up to 11) is the atomic mass
Nitrogen
N
#7
7 protons + electrons
7 neutrons
14.0 is the atomic mass
Fluorine
F
#9
9 protons + electrons
10 neutrons
18.9 (19) is the atomic mass
Sodium
Na
#11
11 protons + electrons
12 neutrons
22.9 (23) is the atomic mass
Aluminum
Al
#13
13 protons + electrons
14 neutrons
26.9 (27) is the atomic mass
Phosphorus
P
#15
15 protons + electrons
16 neutrons
30.9 (40) is the atomic mass
Chlorine
Cl
#17
17 protons + electrons
18 neutrons
35.4 is the atomic mass
Potassium
K
#19
19 protons + electrons
20 neutrons
39.0 is the atomic mass