Answer:
Answer:
As we move from left to right across the
periodic table the number of valance
electrons in an atom increase.
Step-by-step explanation:
As we move from left to right across the
periodic table the number of valance
electrons in an atom increase.The
atomic size tend to decrease in same
period of periodic table because the
electrons are added with in the same
shell. When the electron are added, at
the same time protons are also added
in the nucleus. The positive charge
is going to increase and this charge
is greater in effect than the charge of
electrons. This effect lead to the greater
nuclear attraction. The electrons are pull
towards the nucleus and valance shell
get closer to the nucleus. As a result of
this greater nuclear attraction atomic
radius decreases and ionization energy
increases because it is very difficult to
remove the electron from atom and more
energy is required