Vocab
What do protons change?
The type of atom
How many known elements are there?
118
2
What do neutrons change?
Mass
What is it organized by?
Patterns
What number is never a whole number?
Atomic Mass
What do electronns change?
Charge
What is a row of elements with the same amount of electron shells called?
A period
How do you find the atomic mass?
Average the isotopes and non-isotopes in the universe
Where are valance electrons?
The electrons on the outermost shell only
What is a column with the same number of valance electrons called?
A group
Who was the creator of the modern periodic table?
Dmitri Mendeleev
What is an atomic number?
The number of protons in the nucleus
______are on the left, _______ are on the right.
Metals are on the left, non-metals are on the right.
What year was the modern periodic table made?
1869