Question

15. Which of the following is an exothermic step?
(1) O-(g) + e- → 02-(g)
(2) N(g) + e- → N-(g)
(3) Na(g) + e- → Na-(g)
(4) Na(g) → Nat(g) + e-​

Answer 1

Answer:

Number 4

Explanation:

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Answer 2

Explanation:

number 4 is the answer .pls mark as brainlisr