Where on the periodic table do we find Metals, Metalloids, and Non-Metals?
Metals - to the left
Metalloids - on the stair-step
Non-Metals - to the right
100
Ice melting: Chemical or Physical Change?
Physical Change
100
What is the Law of Conservation of Mass?
Mass cannot be created, nor destroyed.
100
What is the difference between a homogeneous and heterogeneous mixture?
Homogeneous means that the mixture looks the same throughout, you can't tell the 2 ingredients apart.
Heterogeneous means you can still see all the different ingredients, and it's not well mixed together.
200
Name the three subatomic particles and their charges.
What are positive protons, neutral neutrons and negative electrons
200
What is the difference between groups and periods on the Periodic Table?
Groups are vertical, periods are horizontal
200
What about our experiment with vinegar and baking soda indicated (told us) that a chemical change was taking place?
Bubbles and the balloon inflated, showing us that a GAS was being formed.
200
For the compound 7 NH3, what are the subscripts, and what are the coefficients?
Coefficient - 7
Subscript - 3
200
What is the pH range of bases?
Bases have a pH between 7 and 14.
300
Put the following in order from smallest to largest: Compound, mixture, atom
Atom < Compound < Mixture
300
A car made of steel bends when it gets in an accident. What property does this demonstrate?
Malleability
300
If a chemical reaction causes something to get warmer, is this an exothermic or endothermic reaction?
Exothermic (Heat is going OUT)
300
To make a reaction go faster, sometimes it's useful to add heat. In this case, is heat a catalyst or an inhibitor?
Catalyst (Speeds us a reaction)
300
If I dissolve sugar in water, which of the ingredients is the SOLUTE?
Sugar
(Solute - what is being dissolved, usually solid)
400
Name the four types of chemical bonds.
Covalent, Polar Covalent, Ionic, Metallic
400
Who is the creator or "Father" of the Periodic Table?
Dmitri Mendeleev
400
Name the four indicators of a chemical change.
Formation of a gas
Formation of a precipitate
Color Change
Temperature Change
400
___2___ Fe2O → ___4___ Fe + _______O2
Is this equation balanced?
Yes! Same number of atoms on each side of the equation.
400
Name two pH indicators used in our "pH indicator lab."
Red litmus
Blue litmus
Purple Cabbage Juice
pH Strips
500
If an atom has an atomic number of 6, and a mass number of 13, how many neutrons does it have?
Neutrons: 7
(Mass Number - Atomic Number = Neutrons)
500
Name two properties (descriptions) of metals.
Good conductors of heat and electricity, have luster (shiny), malleable, usually solid at room temperature.
500
When you eat, you first take a bite of your food, then you swallow and digest. Which part of this process is a chemical change, and which is a physical change?
Physical Change - Taking a bite of the food
Chemical Change - Digesting the food
500
If a reaction starts with 2 reactants, but results in only 1 product, what type of reaction is this?
(Synthesis, Decomposition, or Combustion)
Synthesis
500
If I pour so much sugar into my Kool-Aid that it can't all be dissolved, have I created a saturated, unsaturated or supersaturated solution?