Question

example of atomic number​

Answer 1

Answer:

atomic number is basically the no. of electrons or we can say, the number of protons that are present in the atom of element(as no. of electrons = no. of protons ...Like for an example we have hydrogen its atomic number is 1 which means it has 1 electron and 1 proton in it.

Answer 2

• Atomic number= Number of proton = Number of electron

the atomic number of an element is represented by' z'.

in 1913 moseley what on data mining the exact positive charge in the nucleus of an atom and gave an important atomic parameter, i.e., atomic number. for example, aluminium's atomic number is 13because number of electrons as well as number of proton in Aluminium is 13.

• during chemical reactions, only the electrons of last shell take part and there is no involvement of protons. so, the atomic number of an atom remains the same. therefore we should always calculate the atomic number from the number of proton.
• for example,in a chemical reaction sodium loses one electron from its valence shell and acquires positive charge but during this process the atomic number of sodium remains uncharged. similarly MG²+iron has same atomic number as that of MGdue to presence of same number of proton,i.e., 12.