periodicity

Question 1

why does nickel have a high melting point?

Answer 1

• contains positive atoms
• in a sea of delocalized electrons
• has metallic bonding
• more energy is required to overcome this

Question 2

why is nickel ductile?

Answer 2

has layers that are able to slide over one another

Question 3

a substance that reacts with socl2 and so2

Answer 3

any base.

NH3

Question 4

why magnesium has a higher charge than sodium:

Answer 4

because it has a higher electrostatic attraction

Question 5

period 3 ionization energy:

Answer 5

increases:
this is due to there being more proton charge and nuclear charge. therefore the energy required to remove electrons increases.

Question 6

How to figure the atomic mass:

Answer 6

you do the isotope * abundance /sum of abundance

Question 7

explain how abundance is figured out in a mass spec

Answer 7

by the detector. When it reaches the detector it produces a signal or an electrical current.

Question 8

periodicity:

Answer 8

trend in properties across a period repeated in the next row

Question 9

explain why more than the minimum energy has not been used to ionize induim:

Answer 9

because it can cause more than 1 e- to be knocked off

Question 10

give two reasons why indium must be ionized?

Answer 10

• so it can be accelerated when it gains a +ve charge

- so it can be detected when it reaches the plate