C1-groups in the periodic table

Question 1

what is group 0 of the periodic table?

Answer 1

the noble gasses

Question 2

do noble gasses have high boiling points?

Answer 2

no they have low ones

Question 3

what us group 1 in the periodic table?

Answer 3

alkali metals

Question 4

name 3 physical properties of an alkali metal

Answer 4

• are soft (they can be cut with a knife)
• have relatively low melting points
• have low densities

Question 5

what does lithium do when added to water?

Answer 5

fizzes steadily; slowly becomes smaller until it disappears

Question 6

what does sodium do when added to water?

Answer 6

fizzes rapidly; melts to form a ball; quickly becomes smaller until it disappears

Question 7

what does potassium do when added to water?

Answer 7

Burns violently with sparks and a lilac flame; quickly melts to form a ball; disappears rapidly, often with a small explosion

Question 8

explain the reactivity as you go down group one

Answer 8

they become more reactive because

• the atom becomes larger
• the outer electron becomes further away from the nucleus
• the force of attraction between the nucleus and the outer electron decreses
• the electron is lost easier

Question 9

what is group 7 called?

Answer 9

the halogens