periodic table

Question 1

Why atomic radii group and period trend

Answer 1

Group-increases down but of the increase of energy levels. Outer electrons not tightly held when further from the nucleus
Period-decreases L to R because increased#of protons pulls the electrons closer to the center(effective nucleus change)

Question 2

Why ionization energy group and period

Answer 2

Group-decreases down cuz the valence electrons are further away from the nucleus and r less attracted
Period-increases L to R cuz the electrons are harder to remove when there are more ‘ve-

Question 3

Why electronegativity group and period

Answer 3

Group-decreases down because they r not attracted and have large atomic radius
Period-increase L to R cuz most attracted to e- and smaller atomic radius

Question 4

What is an ion

Answer 4

An atom that is positively or negatively charged due to e- lost or gained during bonding

Question 5

Why is hydrogen in the first group but not a medal

Answer 5

It has 1 ‘ve- so it acts like a metal by its not

Question 6

Metals

Answer 6

Luster, malleable, ductile,conduct heat/electricity

Likely to lose e-, will corrode

Question 7

Non metals

Answer 7

No luster, break easily, lower densities and melting point s, not easily recognized as a group
Likely to gain e-, not as reactive as metals

Question 8

Explain why hydrogen can be in group 1 or 17

Answer 8

It can gain or lose an e- and still be full