Atomic Structure
What is the arrangement of electrons in an atom called?
Electronic Configuration
Write the electron configuration for an atom of oxygen (O).
2.4
What is a horizontal row on the periodic table called?
Period
How many valence electrons does an atom of chlorine (Cl) have?
7
What is the electronic configuration of neon?
2.8
What is a vertical column on the periodic table called?
Group
How many energy levels are there in an atom?
7
What is the electronic configuration of calcium?
2.8.8.2
What does each element's position on the periodic table represent?
Atomic Number
What are the regions around the nucleus where electrons are likely to be found called?
Electron Shells
What is the electronic configuration of helium?
What is the maximum number of electrons that can be accommodated on the lowest shell?
2
What determines the atomic number of an element?
The number of protons in the nucleus
What is the electronic configuration of potassium?
2.8.8.1
Who created the periodic table?
Dmitri Mendeleev