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What are Nucleons?
We know that every atom contains protons,neutrons and electrons
Out of this
Protons and Nucleons are present in nucleus of atom
They are together called nucleons
What is a Molecule?
A group of atoms chemically bonded together is Here are the valency of a few elements:
called Molecule.
What is atomic number?
It is the number of protons present in the nucleus of an atom
It is denoted by Z
Example 1
For Hydrogen, Z = 1
It means that in hydrogen atom, there is 1 proton present in the nucleus
Example 2
For Carbon, Z=6
It means that in carbon atom, there are 6 protons in the nucleus
What is a Molecule?
A group of atoms chemically bonded together is Here are the valency of a few elements:
called Molecule.
What is Mass Number?
It is the total number of protons and neutrons present in nucleus of atom
It is denoted by A.
Example 1
Carbon atom has 6 protons and 6 neutrons
So, Mass of Carbon is 6+6 = 12 u
Example 2
Aluminium atom has 13 protons and 14 neutrons
So Mass of Aluminium = 13+14 = 27 u
What is a Molecule?
A group of atoms chemically bonded together is Here are the valency of a few elements:
called Molecule.
