Atomic Number, Mass Number, and Net Charge
Atomic Number and Mass Number | Chemistry | the virtual school
How to Determine the ATOMIC NUMBER & MASS NUMBER - CLEAR & SIMPLE
Atomic number and Mass number of an atom - Science
Atomic Number - Isotopes
CHEM 3.1.3 Atomic mass and Atomic Number
Atomic Numbers, Mass Numbers and Isotopes - Chemistry Tutorial
Atomic Number, Atomic Mass and Mass Number
Practice Problems: Net Charge, Mass Number, Atomic Number
What's the Difference between Mass Number and Atomic Mass?
GCSE Science Revision - Atomic Number and Mass Number
Atomic Number and Mass Number.mov
Effective atomic numbers
How to Graph the Atomic Radii & Atomic Number : Chemistry and Physics Calculations
Atomic Number, Mass Number, and Net Charge
Atomic Number and Mass Number | Chemistry | the virtual school
How to Determine the ATOMIC NUMBER & MASS NUMBER - CLEAR & SIMPLE
Atomic number and Mass number of an atom - Science
Atomic Number - Isotopes
CHEM 3.1.3 Atomic mass and Atomic Number
Atomic Numbers, Mass Numbers and Isotopes - Chemistry Tutorial
Atomic Number, Atomic Mass and Mass Number
Practice Problems: Net Charge, Mass Number, Atomic Number
What's the Difference between Mass Number and Atomic Mass?
GCSE Science Revision - Atomic Number and Mass Number
Atomic Number and Mass Number.mov
Effective atomic numbers
How to Graph the Atomic Radii & Atomic Number : Chemistry and Physics Calculations
2.1.5 Protons/neutrons/electrons in atoms/ions from mass/atomic number and charge IB Chemistry SL
QI - Atomic Number Wheelies
2.1.3 Define the terms mass number (A), atomic number (Z) and isotopes of an element IB Chemistry SL
Atomic mass, mass number and isotopes
Attempts At: Atomic Number 78 - Trials Evolution Achievement Guide (Part 1)
Atomic Structure Song
ChemTutor: Atomic Number, Mass Number, Isotopes
Nucleic Symbol - Atomic Notation - Atomic Number and Mass Number - www.whitwellhigh.com
Chemistry Structure of Atom part 11 (Atomic mass & atomic number) CBSE class 11 XI
In chemistry and physics, the atomic number (also known as the proton number) is the number of protons found in the nucleus of an atom and therefore identical to the charge number of the nucleus. It is conventionally represented by the symbol Z. The atomic number uniquely identifies a chemical element. In an atom of neutral charge, the atomic number is also equal to the number of electrons.
The atomic number, Z, should not be confused with the mass number, A, which is the total number of protons and neutrons in the nucleus of an atom. The number of neutrons, N, is known as the neutron number of the atom; thus, A = Z + N. Since protons and neutrons have approximately the same mass (and the mass of the electrons is negligible for many purposes), and the mass defect is usually very small compared to the mass, the atomic mass of an atom is roughly equal to A.
Atoms having the same atomic number Z but different neutron number N, and hence different atomic mass, are known as isotopes. Most naturally occurring elements exist as a mixture of isotopes, and the average atomic mass of this mixture determines the element's atomic weight.