C2 - The Periodic Table

Question 1

Mendeleev’s periodic table

Answer 1

Had gaps

Elements with similar chemical properties were together

Question 2

The modern periodic table

Answer 2

Elements are arranged in rows, and periods in order of increasing atomic number

Elements with similar properties are in groups

Question 3

Group 1 - alkali metals

Answer 3

Soft (can be cut with a knife)

Low melting points (decreases down the group)

Low densities

Reactivity increases down the group

Question 4

Group 1 reactivity trends

Answer 4

Reactivity increases down the group:

as the atoms have greater shielding and are further away from the electron being lost when you go down group 1

Question 5

Group 0 - noble gases

Answer 5

Low boiling points (increases down the group)

Attractive forces become stronger (increase down the group) as the atoms become larger and therefore the intermolecular forces are stronger

Question 6

Group 7 - halogens

Answer 6

Melting and boiling points increase as you go down the group as the atoms become larger and therefore the intermolecular forces are stronger

Reacts with metals to produce salts

Displacement reactions

Question 7

Group 7 reactivity trends

Answer 7

Reactivity decreases down the group as:

there is greater shielding and greater distance from the nucleus as you go down the periodic table

Question 8

Transition metals

Answer 8

Good conductors of heat and electricity

Dense, strong, and shiny

Less reactive to H2O and O2

Higher melting points than group 1