Periodic Table Lesson 1 - Atomic Number and Periodic table
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What is the periodic table arranged in currently
Atomic (Proton) Number
What is Vertical Column called in the periodic table
Groups
What is the Horizontal Row called in the periodic table
Periods
What does Group number tell us
How many electrons are in the outer shell of an atom (Group 0 won’t have this rule as the outer shells will already be full)
What does Period Number tell us
How many electron shells
What was Periodic table arranged in at the early times
Relative atomic mass
Why did Mendeleev leave gaps
Predicted that there was undiscovered elements and left gaps for later discovery
Electron
A subatomic particle with an negative charge
Electronic Structure
How electrons are arranged
Element
Made of one type of atom
Isotope
Same number of protons and electrons (atomic number) but different number of neutrons (mass number)