Chemistry Electron Configuration

Question 1

How do you find the number of protons in an atom?

Answer 1

The number of protons is equal to the atomic number

Question 2

How do you find the number of neutrons in an atom?

Answer 2

The number of neutrons is equal to the atomic mass minus the atomic number
You need to round up or down to the nearest whole number.

Question 3

How do you find the number of electrons in an atom?

Answer 3

The number of electrons is equal to the number of protons which is equal to the atomic number.

Question 4

What are the key features of a Bohr Diagram?

Answer 4

Bohr Diagrams show the number of protons and neutrons in the nucleus
They have the electrons arranged around in orbits.

Question 5

How are electrons arranged in an atom?

Answer 5

Electrons are in orbits or shells around the nucleus

Question 6

Why isn’t the atomic mass a whole number?

Answer 6

The atomic mass is the average atomic mass over all of those atoms - some atoms may have slightly more or less neutrons than others (these care called isotopes)

Question 7

What is the maximum number of electrons you can have in the first orbit/shell?

Answer 7

2

Question 8

What is the maximum number of electrons you can have in the second orbit/shell?

Answer 8

8

Question 9

What is the maximum number of electrons you can have in the third orbit/shell?

Answer 9

8