18 is the ratio of 18 to 1. It's completely rational.
No, 18 is not a square number
18 is an even number.
No 18 is not. It is a abundant number.
No, 18 is not a triangular number.
The number value is 18.
18 is a number.
Peyton Manning is number 18 on the Denver Broncos.
The number is 18.
Argon has an atomic number of 18, which means it has 18 protons. To find the number of neutrons, you would subtract the atomic number from the mass number. If you specifically mean the isotope 18-Argon, it would have a mass number of 18, so it would have 18 - 18 = 0 neutrons.
Argon's atomic number is 18, which means it has 18 protons in its nucleus.
2 x 3 x 3 = 18
If a number is added to itself, it is twice that number → 18 ÷ 2 = 9 → 9 + 9 = 18