chemistry 101!?

Question

can someone pls. answer my questions? my midterm exam is about to come and yet i don't have the answers to these questions. i really need help badly!


1. how come the metallic properties of the elements in the periodic table decreases as you go across and increases as you go down?

2. how come the atomic size of the elements in the periodic table decreases as you go across and increases as you go down?

3. how come the ionization energy of the elements in the periodic table increases as you go across and decreases as you go down?

4. how come the electron affinity of the elements in the periodic table increases as you go across and decreases as you go down?

Answer 1

1.) As we go across a period from left to right, it becomes harder to lose electrons. Its easier as we go down.

2) Same reason. Electrons increase but in the same shell across a period. Thus charges increase but distance doesn't change proportionately.

3) Electrons farther away from the nucleus as we go down.

4) Harder to lose electrons, easier to gain them.