What was Thomson’s model of the atom called? What was Rutherford’s model of the atom called?
Thomson- Plum Pudding Model
Rutherford- Planetary Model
100
What is a system? What are surroundings?
System- the chemical reaction itself
Surrounding- what is affected by the reaction.
100
What is the speed of light?
3X10^8 mps
100
What is matter?
Something that has mass and takes up space.
100
What is the mass (in grams) of 1 mole of magnesium?
24.31 grams
200
How did Rutherford test Thomson’s model of the atom?
The Gold Foil experiment
200
What is the Energy equation? And define the variables.
E=hv
E= energy, h= Planck’s constant (6,626X10^-34), v= frequency
200
What is the light equation? And define the variables.
c=hv {h=lambda}
C=constant, speed of light
h=wavelength
V=frequency
200
What is the Kinetic Molecular Theory based on?
It is based on the idea that particles of matter are always in motion.
200
Give an example of Adhesion and Cohesion working together.
Water traveling up a plant.
300
How are isotopes formed?
By adding or removing neutrons from an atom.
300
Explain the 1st and 2nd laws of Thermodynamics.
1st- Energy isn’t created, nor destroyed, only transformed.
2nd- With every transformation, some energy is degraded into heat. (nothing is 100% efficient)
300
What is the unit of measurement for frequency?
Hertz (Hz)
300
How many molecules of CO2 are in a 66.0 gram sample?
9.03X10^23 molecules
300
Define Ground State.
The lowest energy state of an atom.
400
Rubidium has two common isotopes, Rubidium-85, and Rubidium-87. If the abundance of Rubidium-85 is 72.2% and the abundance of Rubidium-87 is 27.8%, what is the average atomic mass of Rubidium?
89.806 amu
400
What kind of energy transformation(s) occur in a Nuclear Power plant?
Nuclear -> Heat-> Mechanical -> Electrical
400
What happens in an atom to allow a flame to change color?
Electrons transfer to their ground state.
400
What is the mass in grams of 4.25 moles of CaCl2?
472.18 grams
400
If temperature is kept constant in a closed container, as the pressure increases, what happens to the volume of gas?
The volume of the gas decreases.
500
What are all of the components of Dalton’s Atomic Theory?
1. All matter is made of atoms. Atoms are indivisible and indestructible.
2. All atoms of a given element are identical in mass and properties.
3. Compounds are formed by a combination of two or more different kinds of atoms.
4. A chemical reaction is a rearrangement of atoms.