the smallest unit of a pure substance that still has the properties of that substance.
What is an atom?
100
A pure substance that is made up of only one kind of atom.
What is an element?
100
Units formed of two or more atoms.
What are molecules?
100
A combination of 2 or more substances that are NOT chemically combined.
What is a mixture?
100
The measurement of the amount of matter in an object.
What is mass?
200
The theory that all matter is made of atoms.
What is the atomic theory?
200
A table of elements arranged according to their atomic number.
What is the periodic table?
200
In this state of matter, the atoms & molecules of a substance vibrate in fixed positions.
What is a solid?
200
A mixture where the particles of each substance are mixed evenly.
What is a solution?
200
Measurement of the amount of space an object takes up.
What is volume?
300
A subatomic particle that has a positive charge.
What is a proton?
300
The number of protons in an atom of an element. The periodic table is arranged by this.
What is the atomic number?
300
In this state of matter, the atoms and molecules move and slide past each other. (slippery)
What is a liquid?
300
A mixture that contains particles that are large enough to be seen.
Choose the correct example of this: soil in water, milk
What is a suspension?
Soil in water is the correct example since you can easily see the dirt particles in the water.
300
Anthony has a library book. It has a mass of 50g and a volume of 10 cubic cm. What is the density of his book?
The density is 50g divided by 10 cubic cm = 5 g/cubic cm.
400
A subatomic particle that has a negative charge.
What is an electron?
400
The element sodium has 11 protons and 12 neutrons. How many electrons does it have?
Sodium has 11 electrons.
400
In this state of matter, the atoms and molecules move freely past one another. (bouncy)
What is a gas?
400
A mixture that is NOT easily filtered because of the small size of their particles.
Choose the correct example of this: dish soap or chocolate milk.
What is a colloid?
Dish soap is the correct example of a colloid since the particles of the liquid dish soap are too small to be seen with your eye.
400
Austin has a rock. The rock has a mass of 12 g and a volume of 6 cubic cm. What is the density of the rock?
The density is 12 g divided by 6 cubic cm = 2 g/cubic cm.
500
A subatomic particle with no charge.
What is a neutron?
500
The mass number for Neon gas is 20. Its atomic number is 10. How many neutrons does Neon have?
Neon has 10 neutrons since 20 (protons & neutrons) - 10 (#protons) = 10 neutrons.
500
What is the difference between a gas and a plasma?
A plasma has the properties of a gas except it has charged particles.
500
What is the difference between a mixture and a compound?
A mixture is a a combination of 2 or more substances that are NOT chemically combined, but a compound is 2 or more elements that ARE chemically combined.
500
Who found that atoms are made up of even smaller particles called subatomic particles?
J.J. Thomson (or known as Joseph John Thomson) 1856-1940