what is the Zeff trend across a period?

what is the atomic radius trend across a period and a group?

the trend of ions, how are anions and cations related to their neutral atoms? are they larger or smaller or the same??

between atoms of larger Zeff and those of smaller Zeff, which ones are strongly attracted to the nucleus?

what is ionization energy?
what is the trend of ionization energy??

between the first and the second ionization energies which one is higher???

EXPLAIN WHAT ELECTRO AFFINITY IS AND HOW IT TRENDS ACROSS A PERIOD

Explain electronegativity and state the trend.