Question

UU
17. From the following elements:
4Be; 9F; 19K; 20Ca
(a) Select the element having one electron in the outermost shell.
(b) Two elements of the same group.
(C) Write the formula and mention the nature of the compound formed by the
union of 19K and element X (2,8, 7).

Answer 1

Answer:

a) Fluorine

b) beryllium and calcium

c) KCl and nature of bond is the ionic bond