How do you define atomic number?

Answer 1

The atomic number, #Z#, is the number of massive, positively charged NUCLEAR particles.

And #Z# defines elemental identity. #Z=1#, hydrogen, #Z=2#, helium, #Z=3#, lithium,...............#Z=46#, palladium.

Note that the nucleus will also contain differing numbers of neutrons, massive, neutrally charged nuclear particles. This gives rise to the existence of isotopes. For most hydrogen nuclei, the atomic mass is #"1 amu"#, which we would denote by #""^1H#. Some few hydrogen nuclei contain a neutron to give #""^2H#, the deuterium isotope, and some fewer number contain 2 neutrons to give #""^3H#, the tritium isotope. Most of the elements possess a few isotopes.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Axel Alvarado

The quantity of protons in an atom's nucleus is known as its atomic number.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.