Chem 8.4 Protons, Electrons, and the Periodic Table Flashcards
1
Q
How are electrons in an atom arranged?
A
In shells (also called orbits or energy levels).
2
Q
Each shell can hold a maximum of how many electrons?
A
The first shell can only hold 2 electrons, and all the following shells can hold a maximum of 8 electrons.
3
Q
What is an electronic structure?
A
Instead of drawing an atom with all the orbits, the number of electrons in an atom can be written as:
E.g. Magnesium has 12 electrons => 2,8,2
4
Q
What are the elements 1-5?
A
Hydrogen Helium Lithium Beryllium Boron
5
Q
What are the elements 6-10?
A
Carbon Nitrogen Oxygen Fluorine Neon
6
Q
What are the elements 11-15?
A
Sodium Magnesium Aluminium Silicon Phosphorus
7
Q
What are the elements 16-20?
A
Sulfur Chlorine Argon Potassium Calcium
