Periodic Table
Chemical Equations
Physical & Chemical Changes
Elements & Compounds
Substances & Mixtures
100
What are the elements in group 2 on the periodic table known as?
Alkaline Earth Metals
100
Chemical equations are separated by two sections within the equation what are the names of these two sections?
The reactants and the products
100
During a change is matter what is the most common form of energy to be absorbed or released?
Thermal Energy
100
What would you call a molecule that is made up of two or more separate elements?
A compound
100
What are the two types of mixtures?
Heterogeneous and Homogeneous
200
What group number is Hydrogen found on the periodic table?
Group 1
200
Within chemical formulas what can you learn about the atom when looking at the coefficients?
Number of molecules
200
Thermal energy is measured as temperature, when the temperature is high describe the movement of the atoms and molecules.
They will be moving very fast
200
When a chemical change occurs the result is one or both of two things that weren't in the system before, what are those things?
elements or compounds
200
Cookies and Cream ice cream would be classified as a...
Heterogeneous mixture
300
How many Protons are in an atom of Iodine?
53
300
Chemical equations must be equivalent on both the left and right sides, what law states this to be true?
The Law of Conservation of Mass
300
What is the name of the process in which thermal energy is being absorbed during a change in matter?
Endothermic Change
300
How many different elements are in this chemical formula?
C2H2ClK3
4
300
Two substances that are physically combined and appear the same throughout would be classified as what?
A homogeneous mixture.
400
Which group are the elements in group 1 most likely to react with?
Group 17
400
What kind of system should chemist study in order for the findings to be useful?
Closed System
400
What is a property (as color, hardness, boiling point) of matter not involving in its manifestation a chemical change.
Physical properties
400
How many known elements are there?
118
400
What kind of substance has a definite composition?
A pure substance
500
What are the names of the two groups that can be found below most periodic tables?
Lanthanides & Actinides
500
WHat coefficient should you put in front of the products in order to balance this equation?
N2 + O2 ---> NO
2
500
Chemical changes transform matter into one or more substances what are the 4 main clues that this has happened?
Change in Color, change in temperature, formation of a gas, and formation of a precipitate
500
Sodium (Na) is considered an element while sodium chloride (NaCl) is considered a compound. This is because of sodium chloride...
Is made of two different elements
500
What are the smallest particles of a substance that have the properties of that substance.
Molecules