Vocabulary
Atoms, Molecules, and Elements
Key Concepts
Reaction Rules
Extras for Fun
100
The relative size of things.
What is scale?
100
The tiny pieces that all matter—all the stuff in the world—is made of.
What are atoms?
100
The substance(s) that went through the chemical reaction that made rust.
What are the pipe substance (Iron) and fertilizer (Sodium Nitrate)?
100
A process in which atoms rearrange to form new substances.
What is a chemical reaction?
100
The scale we use to see atoms.
What is the atomic scale? or What is the microscale?
200
To change the order or position of something.
What is rearrange?
200
The types of atoms/elements that make up rust.
What is Iron and Oxygen?
200
The reason different substances have different properties.
They are made of different groups of atoms.
200
The fundamental difference between a physical change and a chemical change.
If a new substance is created.
200
What occurs any time heat or fire is involved?
What is a chemical reaction?
300
The starting and ending substances of a chemical reaction.
What are Reactants and Products?
300
Name the substance.
What is the fertilizer? or What is Sodium Nitrate?
300
Fill in the blank:
Groups of atoms _________ to make up a substance.
What is repeat?
300
The number of Hydrogen atoms that were present in the reactants of a chemical reaction resulting in the products: H2O + NaCl
What is 2?
300
The meaning of the word part: terra.
What is land?
400
Fill in the blank:
A model is an object, diagram, or computer program that helps us understand something by making it ______________.
What is simpler or easier to see?
400
The total number of atoms in the chemical formula:
3NaNO3
What is 15?
400
Fill in the blanks:
During a chemical reaction, atoms cannot be _________ or __________.
What is created or destroyed?
400
True or False:
Will there be any products including Oxygen during a chemical reaction involving: NaCl + Fe2 ?
What is False?
Atoms cannot be created or destroyed in a reaction.
400
Decipher what the word endothermic means by breaking up its morphemes.
What is inside heat?
endo=inside
therm=heat
500
The difference between a molecule and a compound.
A molecule is two or more of the SAME atoms bonded together, while a compound contains at least two DIFFERENT elements.
500
The difference in what subscripts tell us vs what coefficients tell us in chemical formulas.
Subscripts tell us how many of each atom is in the molecule, while coefficients tell us how many molecules there are.
500
True or False:
Substances can go through a chemical reaction by themselves.
What is True?
For example, Water's atoms will only rearrange on their own under specific lab conditions such as involving electricity.
500
The elements that all products will include after a chemical reaction involving: HCl + NaOH.
What are H, Cl, Na, and O?
500
Name three different properties that can be used to describe a substance.
What is color, state, shape, smell, length, opacity, boiling point, melting point, freezing point, flammability, reactivity, etc.