Unit 4: Periodic Trends

Question 1

Dmitri Mendeleev

Answer 1

father of periodic table, organized elements by increasing atomic mass, and chemical and physical properties

Question 2

Henry Mosely

Answer 2

organized periodic table in order of increasing atomic number. Is how the table is today

Question 3

study metals vs non-metals chart page 3!

Answer 3

yessir

Question 4

transition metals are what block?

Answer 4

d

Question 5

inner transition metals are what block?

Answer 5

f

Question 6

melting and boiling point increase going

Answer 6

towards Osmium

Question 7

density increases going

Answer 7

towards osmium

Question 8

elements increase in metallic character going

Answer 8

left and down towards Fr (most metallic)

Question 9

atomic radius increases going

Answer 9

left and down

Question 10

shielding

Answer 10

core energy levels block attraction between nucleus and outermost energy level

Question 11

repulsion

Answer 11

electrons in inner shells repel each other

Question 12

electronegativity increases going

Answer 12

up and right towards F (most electronegative), first three noble gases are not electronegative

Question 13

ionization energy increases going

Answer 13

up and right

Question 14

electronegativity

Answer 14

measure of the ability of an atom in chemical reaction can attract electrons.

Question 15

ionization energy

Answer 15

energy required to remove one electron from a neutral atom