The Atom
Subatomic particle in the nucleus with a positive charge
What is a proton?
Isotope symbol for an atom with 1 proton and 2 neutrons
31H
The measure between two crests of a wave.
What is a wavelength
Radioactive decay typically involves changes to this part of the atom.
What is the nucleus?
The charge of an electron.
What is negative?
What are protons and neutrons?
Isotope symbol for an atom of copper (Cu) with 29 electrons and 34 neutrons.
6329Cu
Both units that can be used to measure frequency.
What are Hz and 1/s?
The amount of time it takes for 50% of a sample of an element to undergo nuclear decay.
What is a half-life?
This term equals the number of protons for an atom.
What is an atomic number?
The max. number of electrons in the 1st & 2nd shell.
What are 2 and 8?
Isotope symbol for an atom with 13 protons, 10 electrons, and 14 neutrons.
2713Al3+
The cause of the colors we saw during the flame test lab.
What are excited electrons losing energy (as a photon of light and returning to ground state)?
How many half-lives would it take for a sample to decay from 25 g to 6.25 g?
What are 2 half-lives?
The order of visible light waves, from highest to lowest energy.
Violet, Indigo, Blue, Green, Yellow, Orange, Red
The number of neutrons in an atom of Chlorine-37 (Cl-37).
What is 20?
Element with the following composition: 20% of 11 amu and 80% of 10 amu.
What is Boron (B)?
(10.8)
The frequency of green light with a wavelength of 525 nm.
What is 5.71 x 1014 Hz or /s ?
Sr-91 has a half-life of 9.5 hours. The amount of time it would take Sr-91 to go from 10.0 g to 1.25 g.
What is 28.5 hours?
(3 half-lives)
Bands of light seen when a sample of light is split into distinct wavelengths.
What is a line or emission spectra?
The charge of a phosphorus (P) atom that has 18 electrons.
What is 3- ?
The % abundance of the 2 isotopes of Rubidium: Rb-85 (84.91 amu) and Rb-87 (86.91 amu). Rb has an atomic mass of 85.47.
What is Rb-85 = 72.2% and Rb-87 = 27.9%?
The energy for infrared radiation with a wavelength of 1.00 mm.
What is 1.99 x 10-22 J?
The half-life of Ce-143 if it took 99 hours for a sample to go from 50 mg to 6.25 mg.
What is 33 hours?
The number of half-lives that would be needed for a sample to decay from 1 kg to 3.9 g.
What is 8 half-lives?