Read the list of elements given below.
He, Ne, Ar, Kr
Which of the following about the elements is true?
a All of them are unreactive gases.
b All of them are reactive metalloids.
c He and Ne are unreactive gases and Ar and Kr reactive metalloids.
d He and Ne are reactive metalloids and Ar and Kr unreactive gases.
1 answer
a All of them are unreactive gases.
1 answer