Question

Q5. The atomic number of Cl is 17. On the basis of this information, answer the
questions that follow:-

b)
Find the valency.​

Answer 1

Answer:

The atomic number of aluminium is 13. In the outermost orbit of aluminium atom, 3 electrons are present. Hence, after donating 3 electrons its forms Al

+3

ions, now the number of electrons is 10 and the number of protons is 13. hence, it carries a positive charge.

The atomic number of chlorine is 17. The outermost orbit of chlorine atoms 7 electrons is present. It accepts one electron and forms Cl

−

ions, the number of electrons now is 18 and the number of protons is still 17. Hence, it carries a negative charge

Answer 2

Answer:

The atomic number of chlorine is 17. The outermost orbit of chlorine atoms 7 electrons is present. It accepts one electron and forms Cl

−

ions, the number of electrons now is 18 and the number of protons is still 17. Hence, it carries a negative charge.