C2

Question 1

what do we call group 1 metals

Answer 1

alkali metals

Question 2

what is the trend in reactivity in group 1 ?

Answer 2

reactivity increases as you go down cos the atoms become larger.

Question 3

what do we call the non metals in group 7 ?

Answer 3

halogens

Question 4

how does the reactivity change as you go down group 7 ?

Answer 4

The reactivity of Group 7 elements decreases down the group. … The electrons in the outer shell move further away from the nucleus as we go down

Question 5

what do we call group 0 atoms ?

Answer 5

noble gases

Question 6

Facts ab group 0 atoms

Answer 6

They are all monatomic
colourless
non-flammable gases.
 full outer shells
v low melting and boiling points.

Question 7

how were the elements arranged john newlands ?

Answer 7

table in order of relative atomic mass + put the similar elements into vertical columns (groups.)

Question 8

how did mendeleev arranged the elements ?

Answer 8

in rows by increasing atomic mass.

Question 9

why did mendeleev leave gaps in the periodic table ?

Answer 9

for any undiscovered elements

Question 10

how are elements arranged on the modern periodic table

Answer 10

in order of increasing atomic number.
horizontal rows = periods
vertical columns = groups.
Elements in the same group have similar chemical properties.