Question

What is nitrogen and oxygen and hydrogen and helium gas.

Answer 1

Answer:

Nitrogen : A gas that has no color, taste or smell. Nitrogen forms about 80% of the air around the earth.

Oxygen : Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds.

Hydrogen : Hydrogen is the chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element in the periodic table. At standard conditions hydrogen is a gas of diatomic molecules having the formula H₂. It is colorless, odorless, non-toxic, and highly combustible.

Helium : Helium is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Its boiling and melting point are the lowest among all the elements.

Explanation:

Moreover, if we look for similarities between these gases, then these all are gases which are colorless.