Question

a) How many electrons, protons and neutrons will be there in an element 19/9x? What will be the valency of this element?
b) What are isotopes? Write the three isotopes of hydrogen atom. Write any two applications of an isotope.

Answer 1

Answer:

a) nuetron-10

  electron-9

   proton-9

  valency-1

b) Isotope. An isotope of a chemical element is an atom that has a different number of neutrons (that is, a greater or lesser atomic mass) than the standard for that element. The atomic number is the number of protons in an atom's nucleus

The three most stable isotopes of hydrogen: protium (A = 1), deuterium (A = 2), and tritium (A = 3).

Protium, the most common isotope of hydrogen, consists of one proton and one electron. ...

A deuterium atom contains one proton, one neutron, and one electron.

But different mass number. 1)An isotope Uranium is used as a fuel in nuclear reactor. 2)An isotope of cobalt is used in treatment of cancer