jemilafeysel jemilafeysel

07-05-2020
Chemistry

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number 8?
what is the solution pls???

number 8what is the solution pls class=

Respuesta :

SvetkaChem SvetkaChem

07-05-2020

Answer:

1st group (or 1A in some tables)

Explanation:

Mass number = number protons + number neutrons

23 = number protons + 12

number protons = 23 - 12= 11, so atomic number is 11.

Sodium (Na) has an atomic number 11.

Sodium is in the 1 group, or 1A group in some Periodic tables.

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