ENTREPRENEURSHIP

Detailed explanation-1: -Electronic Configuration in Groups Elements in the same group have the same number of electrons in their outermost shell leading to similar valence shell electronic configuration. Thus, we observe a similar trend in the properties and chemistry of the elements in the same group.

Detailed explanation-2: -1s2 2s2 2p6 3s2 3p6 3d10 4s1 is the electronic configuration of Cu Z = 29.

Detailed explanation-3: -The alkali metals have only one valence electron in their highest-energy orbitals (ns1).

Detailed explanation-4: -If the element is in s block, then the group number is equal to the number of valence electrons. If the element is in the p block, then the number of the group can be determined by the formula: (Number of valence electrons + 10) More items