chapter 7

Question 1

who were the two developers of the periodic table?
when did they do it?

Answer 1

Mendeleev- Russian
Meyer- German

same time, same thing

Question 2

who gets credit for the periodic table and why?

Father of the periodic table?

Answer 2

Mendeleev got credit
because he predicted the new elements

Question 3

what is the screening effect?

Answer 3

when one electron shields the other

Question 4

what is ionization energy?

with subsequent ionizations the ion energy always?

Answer 4

energy necessary to remove and electron from a gaseous atom/ion

increases
i1<i2<i3

Question 5

what is electron affinity

Answer 5

measure of the attraction an atom has for an additional electron

Question 6

characteristics of metals ?

Answer 6

1. have a shiny luster: various colors, although most are silvery
2. good conductors of heat and electricity
3. solids are malleable and ductile

Question 7

what are characteristics of non-metals

Answer 7

1. do not have a luster: various colors
2. solids are usually brittle: some are hard, some are soft
3. poor conductors of heat and electricity