Which of the following factors determines the group to which an element belongs?

How many elements are present in the shortest period of the modern periodic table?

Which of the following arrangements of element is not correct in terms of increasing atomic number?

In the modern periodic Table there are _________ groups and________ periods.

The element which show multiple valencies are know as

Which of the following scientists discovered that the atomic number of an element is a more fundamental property of an element than its atomic mass?

Which of the following metals has more affinity for oxygen than carbon?

How many lanthanides are present in the modern periodic table>

Which of the following elements is a metalloid?

Which of the following elements is not a metalloid?