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never [62]
3 years ago
12

---

Chemistry
2 answers:
svet-max [94.6K]3 years ago
5 0
  • No of protons=No of electrons=15
<h3>Mass no:-No of neutrons+No of protons </h3>

\\ \tt\longmapsto 15+16=31

Now

  • It has atomic no 15 hence its Phosphorus(P)

Electronic configuration:-

\\ \tt\longmapsto 1s^22s^22p^63s^23p^3.

  • Valency=3

Chloride formula:-

\\ \tt\longmapsto XCl_3

or.

\\ \tt\longmapsto PCl_3

valkas [14]3 years ago
3 0

(a)(i) Mass number of X=32.065u

(ii) Electronic configuration of X=[Ne] 3s² 3p⁴

(b)(i) Formula of a chloride of X=Disulfur Dichloride=S2Cl2

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Explanation:

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