What are the charges of the following: neutron, proton, electron
Neutron - neutral, proton - positive, electron - negative
100
What are the three phases of matter?
Solid, liquid, gas
100
How can the materials in a mixture be seperated?
By using their physical properties
100
Define Atom
the smallest particle of an element
200
Are most elements pure or a combination of elements?
Most are a combination
200
Where in the atom are each of the following found: neutron, proton, electron?
Neutron, proton are in the nucleus, and electrons are moving around the nucleus
200
What has to be applied to a material in order for it to change phase?
Heat (energy)
200
What is a mixture of metals called?
An alloy
200
Define element
the basic building block of matter
300
Name 5 physical properties that can be measured
color, odor, mass, volume, texture, hardness, weight, volume, density
300
How is the periodic table organzied?
Rows are arranged according to number of protons, and columns are arranged so that the elements in the column have similar chemical properties
300
What happens to the particles in a material when heat is added?
The particles move faster and spread apart
300
What is the difference between a mixture and a solution?
In a mixture, the materials do not spread out evenly, and in a solution, the materials spread out evenly and will not settle
300
Define compound
a combiniation of elements
400
How can you tell if an object is buoyant?
If it floats, it is bouyant
400
In the formula for glucose, C6H12O6, how many different elements are combined, and how many of each element are there?
3 different elements - 6 carbon, 12 hydrogen, and 6 oxygen
400
What is the boiling point, freezing point, and melting point of a material
Boiling point: temp when liquid becomes gas, freezing point: temp when liquid become solid, melting point: temp when solid becomes liquid
400
How can you allow more solid solute to dissolve in a liquid?
Heating the liquid, and grinding up the solid into smaller pieces
400
How do neutron, proton and electron relate?
They are all parts of an atom
500
How do you find the density of an object?
Measure mass, then volume, then divide the mass by the volume
500
What is the chemical definition of a salt?
A salt is a compound that includes a metal and a nonmetal. Theyare held together through the attraction of opposite charges
500
What is it called when a gas cools, forming droplets of water?
Condensation
500
How much of a substance can be dissolved in a solvent at a certain temperature is called:
Solubility
500
What is the difference between saturated, conccentrated and diltire solutions?
Saturated is all the possible solute that is able to be dissolved in a solvent, concentrated contains so much solute that the solution is closed to being saturated, and dilute contains little solvet compared to solute