To link electron structure to the periodic table
Science - Atomic Structures
2
Questions (Video)
Your turn:
Write the electron configurations of each of the following elements.
3
Your turn:
Write the electron configuration of aluminium, and then draw a Bohr Model diagram of aluminium.
4
Periods & Groups:�Looking at our previous example
Given our answers from earlier, find each of these elements on the periodic table. State their period and group numbers.
5
3:
7:
16:
2,
1
2,
2,
8,
5
6
What do you notice about the period number and the number of electron shells?
Your turn:
Determine the number of electron shells and the number of valence shell electrons for each of the following elements.
6
Period | Group |
| |
| |
| |
Your turn:
Write the electron configuration of the same elements, and compare this against our answer from the previous slide.
7
Period | Group |
2 | 3 |
1 | 2 |
3 | 4 |
Last question:
Given the electron configurations below, determine what the elements are.
8
9
Questions (Worksheet)
Question 1
Recall the maximum number of electrons that can fit in the first three electron shells.
10
Question 2
Write the electron configuration of magnesium and then draw a Bohr model diagram of magnesium including all electron shells.
11
Question 3
A certain element can be found in Group 15 and in Period 2 of the periodic table.
12
Question 4
If electrons are attracted to the positively charged nucleus, why don’t they get dragged into the nucleus?
13
14
Answers (Video)
Your turn:
Write the electron configurations of each of the following elements.
15
3:
7:
16:
2,
1
2,
2,
8,
5
6
Your turn:
Write the electron configuration of aluminium, and then draw a Bohr Model diagram of aluminium.
16
13:
3
2,
8
+
Periods & Groups:�Looking at our previous example
Given our answers from earlier, find each of these elements on the periodic table. State their period and group numbers.
Period 2 ; Group 1
Period 2 ; Group 15
Period 3 ; Group 16
17
3:
7:
16:
2,
1
2,
2,
8,
5
6
What do you notice about the period number and the number of electron shells?
Your turn:
Determine the number of electron shells and the number of valence shell electrons for each of the following elements.
18
Period | Group |
2 | 3 |
1 | 2 |
3 | 4 |
Your turn:
Write the electron configuration of the same elements, and compare this against our answer from the previous slide.
19
5:
2:
14:
2,
3
2
2,
8,
4
Period | Group |
2 | 3 |
1 | 2 |
3 | 4 |
Last question:
Given the electron configurations below, determine what the elements are.
20
Phosphorus
Hydrogen
Sodium
21
Answers (Worksheet)
Question 1
Recall the maximum number of electrons that can fit in the first three electron shells.
22
Question 2
Write the electron configuration of magnesium and then draw a Bohr model diagram of magnesium including all electron shells.
2, 8, 2
23
+
Question 3
A certain element can be found in Group 15 and in Period 2 of the periodic table.
Nitrogen
2, 5
24
Question 4
If electrons are attracted to the positively charged nucleus, why don’t they get dragged into the nucleus?
The repulsive forces between electrons mean that electrons stay a certain distance away from each other. This is why electrons must occupy shells further away from the nucleus once lower shells contain a certain number of electrons.
25
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