Question

Rank the following elements in order of increasing metallic character (from least metallic to most metallic): Ne, K, Mg, Rb, N

2. Which of the following groups of elements all have 7 valence electrons? Select one: Li / Na / K / Rb N / P / As / Sb C / Si / Ge / Sn F / Cl / Br / I B / Al / Ga / In O / S / Se / Te

Answer 1

in the periodic table metallic character increases from top to bottom i.e group and decreases in the period from left to right

Ne is VIII A group

K I A group

Mg II A group

Rb I A group

N V A group

the order is as follows => Ne < N < Mg < K < Rb

2) 7 valence electrons are present means then it belongs to VII A group or some elements are in d-block

element       valence electrons

Li                        1

Na                       1

K                         1

Rb                       1

N                          5

P                          5

As                        5

Sb                         5

C                          4

Si                         4

Ge                       4

Sn                        4

F                           7

Cl                          7

Br                          7

I                              7

B                             3

Al                            3

Ga                           3

In                            3

O                            6

S                            6

Se                          6

Te                            6

answer=> F,Cl,Br,I