Atomic
This was a conclusion drawn from the Gold Foil Experiment.
-The atom is mostly empty space
-The nucleus is positively charged
These quantities are all conserved during a chemical reaction.
What is mass, charge, and energy? (MCE)
According to the Kinetic Molecular Theory of Gases, why would a balloon filled with air expand if it were heated?
What is... the motion of the gas particles would increase and exert a greater pressure on the inside of the balloon, causing it to expand?
This is the nuclear charge of a lithium ion.
What is +3 ?
(NUCLEAR charge is the charge of the nucleus. AKA number of protons)
states that electrons don’t travel in fixed orbits, but are found in orbitals, regions of most probable electron location.
What is the wave mechanical model?
This element has the greatest pull on the electrons in a chemical bond.
What is fluorine?
The conditions best for a gas to behave ideally.
What is low pressure and high temperature?
Separating a mixture of water and alcohol can be done using this technique
What is distillation?
Which reaction is accompanied by the release of the greatest amount of energy? (1) combustion of 10. g of propane (2) rusting of 10. g of iron (3) nuclear fission of 10. g of uranium (4) fusion of 10. g of hydrogen atoms
What is choice (4)?
elements that can’t exist alone in nature; contain 2 identical atoms chemically bonded
What is diatomic elements?
positively charged ion; an ion that results from an atom that loses an electron
What is a cation?
The phase change where steam in changed to ice.
What is deposition?
A reaction that feels cold to the touch due to the absorption of energy from the surroundings is known as this.
What is endothermic?
The type of decay produced by radioactive hydrogen.
What is beta minus?
The stable group of elements located in Group 18 on the periodic table; inert (do not tend to react with atoms of other elements); have a full valence shell
What is the noble gases?
An atom in an excited state has an electron configuration of 2-7-4. Write the electron configuration of this atom in the ground state.
What is... 2-8-3?
The number of joules needed to boil 20.0 grams of water.
What is 45,200 J?
Which liquid on reference Table H has the strongest intermolecular forces? Explain how you know.
What is.. ethanoic acid?
It has the lowest vapor pressure at any given temperature which means it has the lowest level of evaporation therefore the strongest intermolecular forces.
Write the nuclear equation for the decay of radium-226
What is Ra-226 undergoing natural transmutation emitting an alpha particle to form Rn-222.
Identify the noble gas that has atoms with the same electron configuration as an ion of cesium when both the ions and atoms are in the ground state.
What is Xenon?
when an atom absorbs energy and one or more of its electrons “jump” to an orbital further from the nucleus
What is excited state?
Show a numerical setup for calculating the total amount of heat required to raise the temperature of 200. grams of H2O(ℓ) from 0°C to 65°C.
What is.. (200.)(4.18)(65)?
Heat formulas can be found under reference table T.
When an air bag inflates, nitrogen gas is at a pressure of 1.30 atmospheres, a temperature of 301 K and expands to a volume of 40.0 liters. Calculate the volume of the nitrogen gas at STP. Your response must include both a correct numerical setup and the calculated volume.
What is 47.2 L?
V2 = (273 K)(1.30 atm)(40.0 L)/(301 K)(1.00 atm)
Determine the half-life of krypton-92 if only 6.0 milligrams of an original 96.0-milligram sample remains unchanged after 7.36 seconds.
What is 1.84 s?
Why is the radius of the Ca2+ ion smaller than the radius of the Ca atom? Answer in terms of structure.
What is.. the Ca2+ ion has one fewer occupied principle energy level than the Ca atom?