The substances on the left-hand side of the equation are the ___________, and the substances to the right of the arrow are the ____________.
Reactants; products
100
Who created the first Periodic Table?
Dimitri Mendeleev
100
Wood is burned to make a camp fire. The ash left behind after the fire has burned out is evidence of what kind of change?
Chemical change
200
Which two subatomic particles can be found in the nucleus of an atom?
Protons and Neutrons
200
A __________ solution has a lot of solvent in it. It may be considered "watered down."
Dilute
200
If the products of a chemical reaction had a mass of 125g, what was the mass of the reactants?
125 g
200
How is the current periodic table arranged?
By increasing atomic number
200
What properties of metal allow it to be used as electrical conductors?
Conductivity
300
Matter has ________ and takes up _________.
mass; space
300
A _____________ solution has more solute in it than can be dissolved. In this case, extra solute may settle to the bottom or precipitate into a solid.
Supersaturated
300
Acids turn litmus paper _________, while bases turn litmus paper _________.
Red; Blue
300
Elements that have similar properties to metals and non-metals are called _________.
Metalloids
300
Honey has a high _______ because it flows out slowly when poured. What is the name for this property?
Viscosity
400
Arrange the following from smallest to largest:
Atoms
Molecules
Elements
Subatomic Particles
Subatomic particles - atoms - elements - molecules
400
At a restaurant, the chef prepares a fresh batch of sweet tea using sugar, bags of tea, and water. Identify the solvent(s) and solute(s) in this scenario.
Solvent - water
Solutes - sugar, tea from bags
400
If substance A (yellow) is added to substance B (green) in a beaker and the product (black) begins to emit smoke, what type of change has occurred?
Chemical change
400
Neon is a member of which family on the periodic table?
Noble Gases
400
Which Scientific Law explains why you have the same amount of matter on each side of a chemical equation?
Law of Conservation of Matter
500
Which number on the Periodic Table identifies the number of protons in an atom?
Atomic Number
500
What three factors affect solubility?
Temperature, Pressure, and Type of Solvent
500
Balance the following chemical equation:
O2 + Fe --> Fe2O
* note: the numbers in the equation above are subscripts
O2 + 4Fe --> 2Fe2O
500
Which group of metals catch on fire or explode when mixed with water? Identify the group number, and the name of the group.
Group # 1, Alkali Metals
500
Jacques Charles discovered that ________ and volume act in similar ways. So, when one variable increases, the other also increases.