Question

H) elements having valence electrons 4,5,6 or 7 are called as ____________.

Answer 1

Explanation:

is determined by the number of valence electrons in the outermost shell of the element. Bromine has atomic number 35, which means it has 7 electrons in its valence shell.

Answer 2

Answer:

In chemistry, a valence electron is an outer shell electron that is associated with ... For a main group element, a valence electron can exist only in the ... Group 17 (VII) (halogens), 7 .