Atomic Mass vs. Atomic Number

Atomic mass and Atomic numbers are the two terms widely used in the concepts of chemistry and physics. To understand the key concepts of science both these terms hold the significant importance. Most of the times these two terms are confusing for the people, they interchange both these terms. However, they are precisely very much unique from each other though both these terms hold some similarities but they are different from each other. Properties and characteristics of different materials, substances and elements can not be understood by understanding the meanings of these terms. Atomic number is employed in order to clearly define the kind of element a material or maybe substance is. It is defined and described as the number of protons contained in an element’s nucleus Source whereas, on the other hand, Atomic mass is definitely the number associated with both the protons and also neutrons contained in the particular nucleus associated with the element. Electrons really don’t weigh significantly, therefore, the atomic mass is actually determined with the addition of the quantity associated with protons to neutrons. Additionally, it is known as the atomic weight.

What is Atomic Mass?

The mass number or known as atomic mass number is denoted with (A) usually written on the upper side of the element, it is  also referred to as atomic mass number or maybe nucleon number, is definitely the final amount involving protons and neutrons (which collectively  referred to as nucleons) within an atomic nucleus. It decides the particular atomic mass of atoms. Due to the fact protons and also, neutrons both of them are baryons, the particular mass number A is similar along with the baryon number B since  the particular nucleus  of the entire atom or even ion. The mass number is completely different for each and every distinct isotope of the chemical substance component. This is simply not the same as the atomic number (Z)The mass number is presented sometimes following the element name or maybe as being a superscript on the left of your element’s symbol. For instance, the most typical isotope involving carbon is definitely carbon-12, or 12C, which includes 6 protons as well as 6 neutrons. The complete isotope mark would certainly likewise have typically the atomic number. The mass number should not be confused with another similar term which relative atomic mass of an element.

What is Atomic Number?

Atomic number is denoted by the “Z”. When it comes to chemistry and also physics, typically the atomic number associated with a chemical element ( also referred to as the proton number) is definitely the number of protons perfectly located in the nucleus associated with an atom of that element, and for that reason similar to the charge number of the particular nucleus. It really is traditionally symbolized by way of the image Z. The atomic number exclusively determines a chemical element. Within an uncharged atom, the particular atomic number also is comparable to the number of electrons.The atomic number, Z, need to stop wrongly identified as the mass number, A, which is the number of nucleons, The quantity of neutrons, N, is recognized as the neutron number associated with the atom; therefore, A = Z + N (all these amounts will always be whole numbers). Because protons and also neutrons possess roughly the identical mass (as well as the mass of the electrons is definitely negligible for a lot of purposes) and also the mass problem involving nucleon binding is usually smaller compared to the particular nucleon mass, the atomic mass of the atom, whenever indicated inside single atomic mass units Atoms with the exact same atomic number Z however distinct neutron numbers N, and therefore distinct atomic masses, are classified as isotopes.

Key Differences between Atomic Mass and Atomic Number

  1. Atomic number is represented by “Z” whereas Atomic mass is represented by “A”.
  2. Atomic mass does not define the type of element whereas Atomic number defines the type of element.
  3. Atomic mass is used to show different isotopes of the same element whereas its not the case for atomic number.
  4. Atomic mass is measured in the atomic mass unit (amu) whereas the atomic number is just a number.
  5. A number of electrons are always equal to the atomic number but not equal to the mass number.
  6. If atomic number is high it indicates atomic mass will also be high.

Video Explanation

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