Physical properties and changes
More properties
Elements and the Periodic Table
Chemical reactions
Acids and Bases
100
In this state of matter the particles move in all directions.
What is a gas?
100
Diamonds are used to cutting other materials due this classification property
What is Hardness?
100
Over 100 of these are found on the periodic table.
What is an element?
100
On the left side of a chemical equation you have these and on the right you have this.
What are reactants and products?
100
This substance tastes bitter, feels slippery, and turns red litmus paper blue.
What is a base?
200
Name two exothermic reactions
More than one response possible, including: *burning wood *firework explosion *gas combustion in an engine *fusion in stars
200
To determine the density of a sample of matter you must know these two quantities.
What is mass and volume?
200
Elements found in the same group have this in common.
What are chemical properties. (Also: What are number of valence electrons?)
200
This is the number of atoms contained in the following equation C6 H12 O6
What is 24 different atoms?
200
Acids have this pH range.
What is from 0 to 7?
300
As water freezes it undergoes this kind of change.
What is physical change?
300
This is the temperature at which a solid turns into a liquid.
What is melting point?
300
The atomic number of a substance can tell us two things about the atomic structure of that element.
What is the number of protons and electrons?
300
This is the best evidence that a chemical reaction took place.
What is the formation of a new substance?
300
This element has the ability to form straight chains, branched chains, and rings.
What is Carbon?
400
This type of element is generally shiny, a good heat conductor, and can be reshaped.
What is a metal?
400
Burning, rotting, rusting, and the formation of precipitates are all examples or evidences of this kind of change/reaction.
What is a Chemical change/reaction?
400
This group of elements is located in a zigzag line toward the right side of the peroidic table and have characteristics of metals and nonmetals.
What are metalloids? (Also: What are semimetals?)
400
If the reactants contain 12 carbon atoms and 4 oxygen atoms, this must be true of the products.
What is the products must contain 12 carbon atoms and 4 oxygen atoms?
400
This are the four main types of organic molecules.
What are proteins, lipids, carbohydrates, and other minerals?
500
This kind of change alters the appearance of a substance, but DOES NOT change it into a different substance.
What is physical change?
500
Bob tries to disprove this law by burning a log. He weighs the log before he burns it and it has a mass of 25 grams. After burning the log, he weighs the ashes and finds that they have a mass of 17 grams. Bob think that he has disproved this law, but in reality the rest of the mass was given off as smoke.
What is The law of Conservation of Mass?
500
These are negatively charged and help determine how and what the element can bond with to make compounds. For an element to be stable it must have 8 of these in its outer shell.
What are valence electrons?
500
This is the type of bond that forms when two atoms SHARE an electron.
What is a covalent bond?
500
These are compounds created by long chains of smaller molecules.
What are polymers?