Answer:
Atomic number
Explanation:
Atomic number is the number of protons, and therefore also the total positive charge, in the atomic nucleus. The Rutherford–Bohr model of the hydrogen atom (Z = 1) or a hydrogen-like ion (Z > 1).
Answer:
The sum of the protons and neutrons.
Explanation:
protons + neutrons = atomic mass
A. 2
trust me i used to so this in middle school
Heat of combustion ...................................................................
Explanation:
The idea here is that you need to use the Periodic Table of elements to find the mass number of the most common isotope of phosphorus, P.