Energy Levels
Principal energy levels correspond to this feature of the Periodic Table
What are rows (periods)?
This is the definition of mass
What is the amount of matter in something?
A beta particle is this
What is a high-energy electron?
This is the maximum number of electrons that can go in the first principal energy level
What is 2?
This is what happens in a H atom that results in emission of a photon of light
What is dropping from one principal energy level to another level lower in energy?
An energy sublevel consists of
What is all of the orbitals of one type (s, p, d, or f) within a principal energy level?
This is the only way the mass of a system can change
What is when matter is added or taken away?
This kind of particle can be stopped by a sheet of paper (but is deadly if swallowed)
What is an alpha particle?
This is the special name for the electrons in the highest ("outermost") energy level
What are valence electrons?
These are the three kinds of electromagnetic radiation that can be emitted by a hydrogen atom
What are infrared, visible, and ultraviolet?
The number of p orbitals in a sublevel
What is 3?
This is the principle that mass does not change during any physical or chemical transformation in a closed system
What is the conservation of mass?
The isotope formed when polonium-210 emits an alpha particle according to the equation 21084Po --> 42He + ____
What is lead-206?
The Bohr diagram for magnesium has this many energy levels and valence electrons
What are three energy levels and two valence electrons?
When a photon of electromagnetic radiation is absorbed by a H atom, its electron does this
What is jump to a higher energy level?
The order of assigning electrons to orbitals in a p or d sublevel, according to Hund's Rule (the bus rule)
What is only one electron to an orbital and with the spins parallel, pairing up electrons only after all orbitals are half-filled?
By doing this I could determine the mass of oxygen from the air that combines with magnesium to form magnesium oxide (Hint: you can't weigh air, but you can weigh solids)
What is find the mass of the magnesium before and the magnesium oxide after the reaction, and subtract them?
This is how the makeup of a nucleus is changes when it emits a beta particle
What is gain one proton and lose one neutron?
This feature of a Bohr diagram tells us what group the atom is in
What is the number of valence electrons?
When the electron falls from n=6 to n=3 and emits a photon of 1094 nm, we describe the photon as this kind of electromagnetic radiation
What is infrared?
This feature of the electron energy level diagram causes the 3d sublevel to fill after the 4s, so that the transition metals start in Period 4 of the table instead of Period 3
What is the 3d sublevel is higher in energy than the 4s?
This is the equation for calculating the average atomic mass using a weighted average
What is the sum of the masses of all isotopes each multiplied by the relative abundance of that isotope?
This is how much is left after 21 days from an initial sample of 20 g of an isotope having a half-life of 7 days.
What is 2.5 g?
The number of energy levels (orbits) in a Bohr diagram matches this feature of the atom's position in the Periodic Table
What is the period the atom is in?
All of the lines in the visible region result from electrons dropping to this energy level
What is energy level 2?