The atomic number of aluminium is 13. So it has 13 protons and 13 electrons.
Looking at a periodic table, you see Al is number 13. It has 13 protons in the nucleus,so to have a total mass number of 24, it must have 11 nuetrons. Mass number = # protons + # nuetrons
The mass number
mass number
Mercury has 80 protons; the number of neutrons is between 116 and 124, depending on the isotope.
no. of protons+no. of nuetrons in an atom is known as mass no. of that atom.while no . of protons present in an atom is called its atomic no.thus, in 1st condition we consider both, no. of protons as well as no. of nuetrons and in the 2nd condition we just consider no. of protons.
Looking at a periodic table, you see Al is number 13. It has 13 protons in the nucleus,so to have a total mass number of 24, it must have 11 nuetrons. Mass number = # protons + # nuetrons
mass number = protons + nuetrons
The mass number = the number of protons + the number of nuetrons. Each of these particles is considered to have a mass of 1 amu. (atomic mass unit) For example, Aluminum has 13 protons and 14 nuetrons, so it's mass number = 27.
The mass number
mass number = protons + nuetrons
mass number
atomic number is the number of protons. the sum of protons and neutrons is known as mass number
12,13, and 26
Mass number will help you. Mass number is the total of neutrons and protons.
The Mass Number.
An element can be identified by the number of protons in the nucleus of its atoms.
since there are 22 protons there has to be 22 nuetrons since there are 22 protons there has to be 22 nuetrons