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Someone pls explain how I do this work
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Someone pls explain how I do this work

Someone pls explain how I do this work-example-1
User Ys
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Answer:

Explanation:


Element #of protons Mass #. # of electrons Atomic #. Neutron

Se. 34. 78.96. 34 34 45

Si. 14. 28. 14. 14 14

H. 1. 1. 1 1 0


Ca. 20. 40.078. 20. 20. 21

Fe. 26. 56. 26. 26. 30

Na. 11. 23. 11. 11. 12

User Voidlogic
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