Question

In the vertical columns of the periodic table, as the atomic numbers increase:

The numbers of electrons in the valence shell increase.
The tendency to lose electrons decreases.
The ionization energies increase
the size of the atom decreases
The numbers of electron shells increase.

Answer 1

Explanation: The elements in the vertical columns also called as groups are arranged in order of increasing atomic numbers and contain same valence electrons. The electrons are added to new energy shells and the nuclear charge also increases due to increase in atomic number.

Step-by-step explanation: