Question

How did modern periodic table helped in classify izotopes?

Answer 1

Modern periodic table was constructed based on atomic number (in the increasing order). Isotopes: The atoms which posses same atomic number but different mass number are called Isotopes. Since isotopes are considered to be (because of same atomic number) are of same element. So, they kept at only one place as a single element in the Modern periodic table. But not separate place for each of the isotope

Answer 2

HEY MATE,

ISOTOPES - ATOMS OF SAME ELEMENT HAVING SAME ATOMIC NO. BUT DIFFERENT MASS NO. .
EX - $
\frac{}{1}{H}\frac{1}{}{\mathrm{,}}\hspace{0.33em}\frac{}{1}{H}\frac{2}{}{\mathrm{,}}\frac{}{1}{H}\frac{3}{}
$

SO IN MODERN PERIODIC TABLES PROPERTIES OF ELEMENTS BASED ON ATOMIC NO. .

SO ISOTOPES HAVE SAME ATOMIC NO. SO IT'S POSITION DOESN'T CHANGE IN MODERN PERIODIC TABLE.

I HOPE THIS WILL HELP YOU...

PLS MARK AS BRAINLIEST.