7.3 periodic trends in bonding and structure module 3

Question 1

which metals are solids?

Answer 1

all except mercury

Question 2

what is the constant property of all metals?

Answer 2

able to conduct electricity

Question 3

define metallic bonding

Answer 3

the strong electrostatic attraction between cations and delocalised electrons

Question 4

what are the properties of metals?

Answer 4

strong metallic bond
high electrical conductivity
high mp and bp

Question 5

why do metals have a strong electrical conductivity?

Answer 5

when a voltage is applied to a metal, the delocalised electrons can move through the structure carrying charge

Question 6

why do metals have a high mp and bp?

Answer 6

strength of metallic bonds

Question 7

what are giant covalent structures?

Answer 7

billions of atoms held together in a network of strong covalent bonds to form a giant covalent lattice

Question 8

why do giant covalent structures have high mp and bp?

Answer 8

covalent bonds are strong

Question 9

are giant covalent bonds soluble?

Answer 9

insoluble in almost all solvents

Question 10

can giant covalent structures conduct electricity?

Answer 10

no
graphite and graphene can

Question 11

what is the periodic trend in mp?

Answer 11

across period 2 and 3, mp increases from group 1 to group 4
sharp decrease between group 4 and 5
mp are comparatively low between group 5 and 0
sharp decrease mark a change from giant to simple molecular structures