Question

Two elements A and B have atomic numbers 15 and 17 respectively. What type of bonding will be formed when A and B combine and what will be the formula of the compound formed?
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Answer 1

A = Phosphorus

B = Chlorine

Covalent bonding

PCl₅

Explanation:

• The atomic number of Phosphorus and Chlorine is 15 and 17 so elements A and B are phosphorus and chlorine respectively.
• Phosphorus and chlorine combine with covalent bonds.
• Eg: PCl₅ is a covalent compound with no ionic character.

Answer 2

Answer:

element A has atomic number 15

element B has atomic number 17

so element A is phosphorous (P)

and element B is chlorine (Cl)

Elemental phosphorus reacts with chlorine gas according to the equation: P4(s)+6Cl2(g)= 4PCl3(l)