Question

What isotope has 18 protons and 22 neutrons?

Answer 1

The isotope with 18 protons and 22 neutrons is argon-40 (40Ar).

Step-by-step explanation:

An isotope is a variation of an element that has the same number of protons but a different number of neutrons. To identify the isotope with 18 protons and 22 neutrons, we can look at the periodic table. The element with 18 protons is argon (Ar). Since the isotope has 22 neutrons, we add the number of protons and neutrons to get the atomic mass of the isotope, which is 40. Therefore, the isotope with 18 protons and 22 neutrons is argon-40 (40Ar).

Answer 2

Argon.

Step-by-step explanation:

Argon is the element having 18 protons and 22 neutrons present in its nucleus. so its atomic number is 18 and mass number is 40 if we added both number of protons and neurons. Argon belongs to noble family due to completion of outermost shell and non reactive nature. It is the third most abundant gas about 0.934% present on the earth after nitrogen and oxygen.