Question

Given below are some elements of the modern periodic table:
4Be, 9F, 12Mg, 14Si, 19K
a)select the element that has one electron in the outer most shell and write its electronic configuration.
b)Select two elements that belong to the same group. Give reasons for your answer.
c)Select two elements that belong to the same group. Which one of the two has bigger atomic size.
d)Which element is more metallic and which is more non metallic in nature.

PLS PLS PLS ANSWER THIS QUESTION​

Answer 1

Answer:

1)potassium ,1s2 2s2 2p6 3s2 3p6 4s1

2)Be and Mg belong to same group because they have same number of Valence electrons or electrons in the outermost shell

3)Mg has bigger atomic size atomic size generally increases down the group

4)Mg is more metallic in its group but K is more metallic in all the elements given above ...F is more non metallic

Answer 2

Answer:

a) 19K

electronic configuration =2,8,8,1

b) 4Be and 12Mg

reason =because they are active metals(Alkali metals and Alkaline earth metals)

c) 4Be and 12Mg

Mg is bigger than Be

d) K is more metallic and F is more non-metallic