EL4 Organising the Elements

Question 1

How are the elements arranged in Mendeleev’s version of the periodic table?

Answer 1

by increasing relative atomic mass

Question 2

How are the elements arranged in the modern version of the periodic table?

Answer 2

by the atomic number (number of protons)

Question 3

The elements are broken into 4 main blocks, which letters are used?

Answer 3

s, p, d, and f block

Question 4

What is periodicity?

Answer 4

The presence of a pattern that is repeated as you go across periods

Question 5

What is a closed shell arrangement?

Answer 5

These are elements which have a full out shell, these are very stable.

Question 6

What ionic charge do the following make:
Group 1 = 
Group 2 =
Group 7 = 
Group 6 =

Answer 6

Group 1 = +1 ions
Group 2 = +2 ions
Group 7 = Usually -1
Group 6 = -2 ions

Question 7

What is the electronic configuration of S^2- ion?

Answer 7

1S^2,2S^2,2P^6,3S^2,3P^6

Question 8

What is the electronic configuration of Na+ ion?

Answer 8

1S^2,2S^2,2P^6

Question 9

Which block do the following elements come from?
chromium
aluminium
uranium
strontium

Answer 9

chromium = d block
aluminium = p block
uranium = f block
strontium = s block

Question 10

Identify the following elements:
Group = 2 Period = 3
Group = 7 Period = 5
Group = 3 Period = 5

Answer 10

Magnesium
Iodine
Indium