Reactions 1
Randoms
Atomic Structure
Reactions 2
Periodic Table
100
This energy from this type of reaction is often released through heat.
Exothermic
100
What is a compound?
When one or more atoms combine together, they are called compounds
100
One of the three types of subatomic particles. [Has a positive charge]
Protons
100
The new substance formed in a chemical reaction.
Product
100
The three groups of elements on the periodic table.
Metals, metalloids, and nonmetals
200
Chemical reaction that absorbs energy and feels cold
Endothermic Reactions
200
The element with 21 protons
Scandium
200
All matter is composed of...
Atoms
200
A change in matter that does not result in a new substance.
Physical change
200
Tell 2 properties of metals
Shiny, malleable, conductive, ductile
300
Fire is a _________ reaction
Exothermic
300
What are the reactants in this reaction?
Cr + O2 → Cr2O3
Cr and O2
300
The center of an atom
Nucleus
300
This law states that matter is never created nor destroyed.
The Law of Conservation of Mass
300
Tell 2 properties of nonmetals
Dull, brittle, poor conductors
400
What elements and how many atoms: 3Na2OH3
Na = Sodium, 6
O = Oxygen, 3
H = Hydrogen, 9
400
What is the atomic number?
79
400
This type of subatomic particle has a negative charge
Electron
400
If a chemical change has happened, a ___ happened as well.
Chemical reaction
400
The elements in last column of the periodic table are called
Nobel Gases
500
Balance the equation:
Cr + O2 → Cr2O3
4Cr + 3O2 → 2Cr2O3
500
Look up element #73 and tell 2 of its properties
Shiny, ductile, malleable, good conductor
500
This type of particle does not have a charge
Neutron
500
The 4 main signs of a chemical reaction
Solid formation, gas formation, color change, temperature change
500
The elements in a column all share similar _______
properties