Question

subatomic particles worksheet (fill in the missing information)
element atomic # atomic mass # p⁺ # e⁻ # n⁰
magnesium 12 12
argon 18 22
helium 2 2
boron 5 6
chlorine 17 18
silicon 28 14
fluorine 19 9
hydrogen 1 1 0
oxygen 8 8 8
calcium 40 20
lithium 7 3
nitrogen 7 7
sodium 23 12
sulfur 16 16
beryllium 9 4
neon 10 10
carbon 6 6 6
phosphorus 31 15
potassium 19 20
aluminum 27 13

p⁺ = atomic # n⁰ = atomic mass - atomic # # e⁻ = #p⁺

Explanation:

Step1: Recall atomic - number rule

The number of protons (\(\#p^{+}\)) is equal to the atomic number.

Step2: Recall electron - proton relationship

In a neutral atom, the number of electrons (\(\#e^{-}\)) is equal to the number of protons (\(\#p^{+}\)).

Step3: Recall neutron - calculation formula

The number of neutrons (\(\#n^{0}\)) is calculated as atomic mass - atomic number.

Element	Atomic #	Atomic mass	\(\#p^{+}\)	\(\#e^{-}\)	\(\#n^{0}\)
argon	18	40	18	18	22
helium	2	4	2	2	2
boron	5	11	5	5	6
chlorine	17	35	17	17	18
silicon	14	28	14	14	14
fluorine	9	19	9	9	10
hydrogen	1	1	1	1	0
oxygen	8	16	8	8	8
calcium	20	40	20	20	20
lithium	3	7	3	3	4
nitrogen	7	14	7	7	7
sodium	11	23	11	11	12
sulfur	16	32	16	16	16
beryllium	4	9	4	4	5
neon	10	20	10	10	10
carbon	6	12	6	6	6
phosphorus	15	31	15	15	16
potassium	19	39	19	19	20
aluminum	13	27	13	13	14

Answer:

The completed table is shown above.