periodic table

the number of protons + neutrons in the atom

f-block is located on the left of the table

mendeleev arranged elements in an ascending order according to their .....................

..................discovered that the nucleus of the atom contains positively charged protons.

Na element with 11 atomic number.in which period and group is it?

Moseley arranged elements in an ascending order according to their

mendeleev's periodic table contains alot of isotopes

....................elements are classified in the modern periodic table , ........ elements are found naturally

.....................revolve around the nucleus in fixed orbits called.........................

is the number of protons in the nucleus

Mendeleev classified .................... elements on 1871