Electrons in Atoms
Energy Levels
Periodic Table
100
The region around the nucleus where an electron is likely to be moving
What is an energy level (orbital)
100
The number of orbitals found in 1s
What is 1
100
When elements are arranged in order of increasing atomic number, there is a periodic repetition of their properties
What is periodic law
200
The space outside the nucleus where there is a high probability of finding an electron
What is atomic orbital
200
How many electrons can the 1s orbital hold
What is 2
300
The amount of energy required to move an electron from one energy level to another
What is a quantum of energy
300
The number of orbitals in the 4th energy level
What is 16
400
Electrons must enter the orbitals of lowest energy first
What is the Aufbau principal?
400
The number of energy levels found in row 1of the periodic table
What is 1
500
the energy needed to remove an eletron from an atom
What is ionization energy
500
The number of energy levels found in elements on row 4 of the periodic table
What is 4
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