Question

element a, b, c and d having atomic no. 5, 12,13 and 19 respectively , (ju18) • which element shows similar chemical properties - • write electronic configuration of an element d -

Answer 1

Boron (Z=5) and Aluminium (Z=13) will show similar properties. Electronic configuration of element D (potassium) is 1s2, 2s2, 2p6, 3s2, 3p6, 4s1.