I think you're referring to Pauli of the Pauli exclusion principle?
Thomson
bohr said this
Yes. Atoms of two different elements are always different.
All atoms in a pure sample of one element have the same mass. The atoms in a different element have a different mass. Different atoms is what makes different elements.
These atoms are called isotopes and they have a different number of neutrons.
who said this atoms of different elements are different
He said that compounds are formed when atoms of different elements combine
He said that atoms can not be divided; in one matter all the atoms are of same kind,same mass and same type. He also said that different matters have different kinds of atoms. He furthermore said that atoms from different matters meet together at a particular rate and make molecules.
He said that atoms can not be divided; in one matter all the atoms are of same kind,same mass and same type. He also said that different matters have different kinds of atoms. He furthermore said that atoms from different matters meet together at a particular rate and make molecules.
If the atoms of the same element (not only carbon!) occur in different arrangements, they are said to be different allotropes.
No. Atoms are what make up elements, so they don't count.
Thomson
The subatomic particle that makes atoms of different elements different from each other is the proton. This is given as the atomic number of the element on the periodic table.
Unstable atoms are said to be radioactive
Democritus was the one who said that atoms constantly move. He was a Greek philosopher and said this around 440 BC.
atoms have symbols so that the atoms of different elements can be distinguished easily.
bohr said this