c2.2

Question 1

mendeleev periodic table

Answer 1

arranged elements..
in order of increasing atomic mass and similar chemical properties
table had gaps (no noble gases)

Question 2

modern periodic table

Answer 2

arranged elements..
in order of increasing atomic number
no gaps
similar chemical and physical properties

Question 3

metal properties

Answer 3

shiny
high melting + boiling point
solid at room temp
malleable (bend without shattering)
ductile (can be pulled into wires)
good conductors

Question 4

non-metal properties

Answer 4

dull
low melting+boiling points
half are solid half are gas at room temp
brittle (shatter when hammered)
non-ductile (break when pulled)
insulators (poor conductors)

Question 5

metals

Answer 5

lose electrons, form positive ions
do not react with each other, mix to form alloys
metal oxides produce alkaline solutions

Question 6

non-metals

Answer 6

gain electrons, form negative ions
react with each other to form compounds
non-metal oxides produce acidic solutions

Question 7

electron diagram

Answer 7

jus go over it

Question 8

ionic compounds

Answer 8

metal reacts with non-metal
electrons transferred
metal ions lose electrons, non metal gains
dot and cross diagram
giant ionic lattice
ionic bonds

Question 9

simple molecules

Answer 9

non-metals joined together by covalent bonds
molecule that only contains a few atoms
strong covalent bonds
weak intermolecular forces
hydrogen, carbon dioxide, water, oxygen, monomers

Question 10

ionic bonds

Answer 10

• strong electrostatic forces of attraction between oppositely charged ions

Question 11

covalent bonds

Answer 11

bonds between non-metals
shared pair of electrons
electrostatic forces of attraction
dot and cross diagram

Question 12

giant covalent structures

Answer 12

many non-metals joined together by covalent bonds + giant ionic lattice ( repeating, regular pattern )
diamond, graphite, and silicon dioxide
many strong covalent bonds

Question 13

structure of metals

Answer 13

giant metal lattice
electrons leave the outer shell of metal atoms and form a sea of delocalised electrons around positively charged metal ions - they are free to move throughout structure

Question 14

metallic bonds

Answer 14

strong electrostatic forces of attraction between delocalised electrons and the closely packed, positively charged metal ions