Changes
Boiling water is what kind of change?
Physical Change
What is the density equation?
Density = Mass / Volume
What are the charges of protons, neutrons, and electrons.
Protons = Positive. Neutrons = Neutral. Electrons = Negative
How are Pure Substances combined?
Chemically
Describes what happens when conditions are met
Law
Mixtures can be seperated by what kind of changes?
Physical
Salt readily dissolves in water. What property is that describing?
Solubility
What subatomic particles are in the nucleus of an atom?
Protons and neutrons
Water (H2O) is what kind of matter?
Compound
Tom checking his results by doing his experiment again.
Repetition
What are the five signs of a chemical change?
New substance, New smell, New color, Energy given off, Gas released
What is the volume of a rock if when placed in 20 mL of water, the water level rises to 200 mL?
180 mL
If an atom has 21 protons what else is 21?
Electrons and atomic number
Why is air a mixture?
Easily separated by filters
The amount of matter in an object
Mass
A neutralization reaction is what kind of change and why?
Chemical. Salt is made
A block of cheese has a mass of 20g and a density of 45 g/mL. What would be the density of a 10g block of cheese?
45 g/mL
What is the number of neutrons if an element has 21 protons and an atomic mass of 61?
40
Putting red food coloring in a glass of water so you can prank some losers.
Homogenous Mixture
How shiny something is
Luster
The total mass of paper is 10g. What would be the total mass after it is burned?
10 g
Describe the conductivity, malleability, and solubility of an air pod.
Highly conductive, low malleability, and low solubility.
Nonmetals
Glucose Sugar (C6H12O6) is taken apart and placed back together as Water and Carbon Dioxide. What kind of matter is made?
Compounds
Multiple atoms chemically combined
Molecule