Question

mandleef periodic table ​

Answer 1

in mandlee periodic

every 1

after every 7 element they are similar as first

it is only up to calcium

it chose mass number

Answer 2

Answer:

Explanation:

the mendeleev periodic table says that.

there are only 7 periods in periodic table.

he found only till calcium atom.

he may nt able to arrange the atom acc to there atomic mass.he found difficulties in arranging the no.

because many elements have same phy and che properties same .

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