Sodium (Na) has an atomic number of 11 and an atomic mass of 23. Which of the following correctly shows the electron arrangement for sodium?
2,9,1
2,8,2
2,9
2,8,1

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answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

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