Which of the following set of quantum numbers (ordered n, ℓ, mℓ, ms) are possible for an electron in an atom? check all that apply
a)2, 1, -2, 1/2
b)2, 1, 0, 1/2
c)3, 2, 0, -1/2
d)-2, 1, 0, -1/2
e)2, 4, 1, -1/2
f)2, 1, 0, -1
g)4, 3, 4, -1/2
h)3, 1, 0, -1/2

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).

it is stable as it is in group 0 which have full outer shells of electrons

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