Question

helium is an example of
a element
b noble gas
c p block element
d metal
e a and b are correct
f c and d are correct

Explanation:

Helium is a pure substance made of only one - type of atom, so it is an element. It is also a noble gas as it has a full outer - electron shell and is chemically inert under normal conditions. It is a p - block element too, but the most common and well - known characterizations are as an element and a noble gas. It is not a metal.

Answer:

E. a and b are correct