Question

u element
eletronic Configuration is 28,7
B-2,8,2
c-2,7
0 2,6
E-28,8
3) Identify metals and non metals
iſ Identify elements which belong to same group.​

Answer 1

Answer:

B-metal(as it can lose its 2 valence electrons to form a positive ion)

C- nonmetal(as it can gain 1 electron and form a negative ion with attainment of noble gas configuration)

O-nonmetal (as it can gain 2 electron and form a nonmetal because it is short of 2 electrons from attaining a noble gas configuration)

E- inert gas (complete octet)

u element is a non metal (it can gain 1 electron and form a negative ion)

elements that belong to the same group are u and c as they both have 7 valence electrons in their outermost shell