The Atom
Elements
Compounds & Bonds
Chemical Reactions
Potpourri
100
The three subatomic particles and their charges
What are the electron (negative), proton (positive), and neutron (neutral)?
100
The definition of an element
What is a pure substance that cannot be broken down into other substances by physical or chemical means?
100
The definition of a compound
What is a pure substance formed when two or more elements chemically combine?
100
The definition of a chemical reaction
What is the reorganization of atoms into different substances and combinations?
100
This states that matter cannot be created or destroyed
What is the law of conservation of mass?
200
The number of protons in an atom
What is the atomic number?
200
Horizontal rows on the Periodic Table
What are periods?
200
Electron sharing
What is covalent bonds?
200
These are broken and/or formed during chemical reactions
What are chemical bonds?
200
Type of reaction in which energy is given off
What is an exothermic reaction?
300
The number equal to the total number of protons and neutrons in an atom
What is the mass number?
300
Vertical columns on the Periodic Table
What are groups?
300
Giving up or gaining electrons
What is ionic bonding?
300
These are the starting substances of a chemical reaction
What is a reactant?
300
The definition of a catalyst
What is a substance that lowers the activation energy needed to start a reaction?
400
A 3-D region around the nucleus that indicates the probable location of an electron
What is the orbital?
400
The definition of isotopes
What are atoms of the same element that have different numbers of neutron?
400
What an atom turns into after ionic bonding
What is an ion (carries a charge)?
400
The minimum amount of energy needed for reactants to form products
What is activation energy?
400
This part of the atom determines the chemical identity
What is the nucleus?
500
The way to find the number of neutrons in an atom
What is subtracting the atomic mass by the atomic number?
500
Each individual block on the Periodic Table represents this
What is an element?
500
The definition of a molecule
What is a compound in which the atoms are held together by covalent bonds?
500
All chemical reactions must have equal THIS and THIS
What are the number of reactants and the number of products?
500
An enzyme increases this
What is the rate of chemical reactions?
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