Science of Chemistry
solid, liquid, gas
What are the states of matter?
Mass and volume
What are the characteristics of matter?
Energy is absorbed.
What is endothermic reaction?
States that chemical compounds always contain the same elements in the same proportions.
What is the law of definite proportions?
Another name for protons and neutrons?
What are nucleons?
Changes that do not involve changes in the identity of the substance.
What is a physical change?
The ratio used to change units.
What is a conversion factor?
Temperature
What is the average kinetic energy of the particles of a substance?
The number of protons in an atom
What is the atomic number?
Fission, fusion and radioactive decay
What is nuclear change?
Burning wood
What is a chemical change?
Size, color, density, shape
What are physical properties?
How how or cold something is
What is heat?
Experiment that discovered that the atom is mostly empty space.
What is Rutherford's gold-foil experiment?
Mass lost when separated nucleons form a nucleus
What is mass defect?
A color change
What is an indicator of chemical change?
kilogram
What is the SI unit for mass?
Convert 459K to celsius.
What is 183 C?
The sum of protons and neutrons in an atom.
What is the mass number?
The force that holds the nucleus of the atom together.
What is strong force?
When two clear solutions mix, and the mixture becomes cloudy.
What is a precipitate?
How many liters are in 2500cm3?
What is 2.5L?
Number of significant figures in 0.0004590.
What is 4?
Atom with the same number of protons, but a different number of neutrons.
What is an isotope?
Polonium-214 --> Lead-210 + alpha particle
What is alpha decay?