B. All atoms of silver have the same atomic number but different numbers of neutrons in the nucleus.
The two properties of most non metals are high ionization energy and poor electrical conductivity. The correct option among all the options that are given in the question is option "1".
In general it is known that nonmetals are very poor
conductors of heat and electricity. The nonmetals that are solid are normally
very brittle and has very little or no metallic luster at all. Nonmetals are
highly reactive and show variety of chemical properties. It can also be pointed
out that the nonmetals gain electrons very easily.
Appropriate symbol for an isotope of potassium - 39 corresponding to the isotope notion r A ZX
The answer would be electronegativity
