Mystery...
The mass of an atom is from which two subatomic particles?
Protons and Neutrons
This scientist put electrons in energy levels or rings around the nucleus.
Who is Niels Bohr.
There are ______cm in one meter.
What is 100.
Visible light consists of what colors?
What is ROYGBIV. Red, Orange, Yellow, Green, Blue, Indigo, and Violet.
The columns on the periodic table organize elements by...
What is reactivity or number of valence electrons.
The form of radiation with the shortest wavelength is...
Gamma radiation
This subatomic particle has a mass of 1 amu and a positive charge.
What is a proton.
If a dart player can consistently (repeatedly) hit the bull's eye on the dart board is he accurate, precise or both?
What is both.
What is charge of a sulfur atom when it becomes an ion?
What is 2-.
___________ developed the first periodic table.
Who is Dimitri Mendeleev.
If uranium-238 has a half life of 50 years, what fraction will remain after 200 year pass?
1/16th
Same element with a different number of neutrons. (Ex. Protium, Deuterium, and Tritium are all forms or _________ of hydrogen)
What is isotopes.
2,300,000,000 in scientific notation is...
What is 2.3 * 10^9.
Metal atoms will typically _____ electrons when they become ions.
What is lose.
CO2 is a ____________ molecule. (polar or nonpolar).
What is nonpolar.
The type of nuclear decay that releases a helium nucleus.
Alpha decay
This experiment led to the discovery of neutrons in the nucleus, and the realization that most of the atom is empty space.
What is the gold foil experiment.
2.345 * 45,600,000 = ________. The answer should have how many significant figures?
What is 3.
What is the orbital notation (electron configuration) for a Iron atom?
What is 1s2 2s2 2p6 3s2 3p6 4s2 3d6.
As you move right across a period on the periodic table, atomic radius will _____________.
What is decrease.
The average atomic mass of nitrogen who has two isotopes and percent abundances as follows is:
14.0031 amu - 94.63%
15.0001 amu - 5.37%
14.06 amu
How many neutrons are in an atom of Bromine that has a mass of 71 amu?
What is 36.
The are _____ molecules in 234.2 g of water.
What is the orbital notation for a Bismuth atom?
What is 1s2, 2s2, 2p6, 3s2, 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p3.
The Lewis structure for NH3 has ___ lone pair(s) of electrons around the central atom.
What is one.