http://prntscr.com/5z2wpk @Somy

Question

somy · Answer

1 very reactive 
2 reacts with Chlorine which means it has 1 electron ONLY to give it to chlorine BECAUSE the bond they form is IONIC (where one gives electron and another takes that electron)

so what do these points lead you to think?

anonymous · Answer

group 15

anonymous · Answer

@Somy

somy · Answer

how many electrons in the last shell does that group have?

anonymous · Answer

not sure cause i haz no picture

somy · Answer

google periodic table 
number of group represents number of outermost electrons of the elements in that group

anonymous · Answer

Group 1 Hydrogen

somy · Answer

there are more elements there 
& H is wrong because its not shiny first of all and it doesnt for IONIC BOND but it forms covalent bond 
but the answer is still group 1 :) coz it has metals in there 
just remember that property-wise H is exception of group 1 elements

somy · Answer

is it clear?

anonymous · Answer

NOPE

somy · Answer

hmmmmmmmmmmmmmmmm 
have you learnt about periodic table and bond formation?

somy · Answer

in school