Need help completing a table, explanations as well

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OyhrBprna

Science

Description

Please help me complete this table, I need an explanation on how you complete it!


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Explanation & Answer

Attached.

B.7
Element
Chlorine
Zinc
Calcium
Lanthanum

Symbols
17
Cl
30
Zn
20
Ca
57
La

Protons
17
30
20
57

Neutrons
19
35
20
80

Electrons
17
30
20
57

Mass number
36
65
40
137

Symbol
76
Os
50
Sn
74
W
25
Mn

Protons
76
...


Anonymous
Goes above and beyond expectations!

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