c2- the periodic table

Question 1

what did mendeleevs period table leave gaps for?

Answer 1

unknown/undiscovered elements

Question 2

what does the atomic (proton) number determine?

Answer 2

it’s position in the periodic table

Question 3

the group number equals the number of ….

Answer 3

electrons in the outer shell

Question 4

how reactive are most noble gases?

Answer 4

unreactive

Question 5

what are the elements in group one called?

Answer 5

alkali metals

Question 6

the reactivity of alkali metals _________ going down the group

Answer 6

increases

Question 7

the melting and boiling points of alkali metals __________ going down the group

Answer 7

decrease

Question 8

what do alkali metals react with water to produce?

Answer 8

hydrogen and an alkaline solution containing the metal hydroxide

Question 9

what are the elements in group 7 called?

Answer 9

halogens

Question 10

the reactivity of a halogen ________ going down the group.

Answer 10

decreases

Question 11

how do the halogens form covalent compounds with other non metals?

Answer 11

by sharing electrons

Question 12

what charge to halogens form ions with in ionic compounds?

Answer 12

a single negative charge

Question 13

what does electrostatic attraction depend on?

Answer 13

• distance between outer shell and nucleus
• number of inner shells
• size of positive charge on the nucleus