Bohr-Rutherford Diagrams and the Periodic Table
Steps to drawing Bohr-Rutherford diagrams
1. Write the symbol of the element in Standard Atomic Notation.
- Write the Symbol of the element
- Write the Mass Number, the amount of particles in the nucleus, as a superscript to the right of
the symbol.
- Write the Atomic Number, the number of protons in the nucleus, a a subscript to the right of
the symbol
2. Infer the number of neutrons.
- Remember mass number = # protons + # neutrons, so the # of neutrons = Mass number – Atomic Number
3. Find the number of Electrons
- Remember in neutral atoms the # of electrons = # of protons
4. Drawing the nucleus
- Draw a circle, in the circle write the number of protons and neutrons
5. Drawing electron configuration
- Draw a circle around your nucleus
- Place an x (or a dot) to represent each of the electrons in that shell (the first shell can hold only 2 electrons.
- Draw another circle, starting from the top and then a quarter way around the circle draw in the electrons one
at a time until the shell is full (8 electrons). Continue with more shells as needed
Complete the following table
Name element Symbol
Atomic #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Mass Number # P
#E
#N
In the table below draw a Bohr-Rutherford diagram for the first 20 of the elements on the periodic table.
1
2
The Periodic Table of Elements
And Bohr-Rutherford Diagrams
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1. What do you notice about the # of electrons as you move along a row?
2. Describe the reactivity between the families of elements?
3. What do you notice about the # of shells as you move from one period to another
4. Describe what happens to reactivity as you move down the metals families? Up the non-metals families?