Periodic Table
How many elements are on the periodic table?
118
What are the three main subatomic particles?
Protons, Neutrons, and Electrons
What is an Isotope?
A version of an atom with a certain number of neutrons.
What is the speed of light?
3 * 10^8 meters per second
Who made the Bohr model?
Niels Bohr
Where do metalloids reside on the periodic table (Left, Middle, or Right)?
Middle
Which subatomic particles are not found in the nucleus?
Electrons
What is the atomic mass number that lies under the element symbol on the periodic table?
An average of all of that atom's Isotopes
What is Planck's constant?
6.626 * 10^-34 joule seconds
What does the Bohr model represent?
An atom
Which group is the halogens in?
7 or 17
How many neutrons does a atom of Oxygen-16 have?
If, in a given sample of Cadmium atoms, the atomic mass average is 112.951, what is the most common isotope of Cadmium?
Cadmium-195
What is the part in the electromagnetic spectrum that has the highest frequency and energy?
Gamma rays
What happens when electrons jump shells?
A photon is emitted
Which element resides at Group 7, Period 5?
Technetium
A Cation
If, in a given sample, 75% of the atoms are Hydrogen-1, and 25% are Hydrogen-2, what would the atomic mass average be?
1.75
How do you calculate energy?
Planck's Constant times Frequency
If an electron jumped down a level, would more energy be released than if it jumped up a level?
Electrons can't jump up levels, therefore it wouldn't release any energy.
Which elements on the periodic table are a liquid at room temperature?
Mercury and Bromine
How many electrons does a neutral atom of Xenon-131 have?
54
If, in a given sample of Zirconium, there are 5 atoms of Zirconium-92 and 82 atoms of Zirconium-91, what would the average be?
91.06
A photon of light has an energy of 9.80 x 10^-21 J. What is the wavelength (nm) of the light?
2.03 * 10^4 nm
107