Elements and Compounds
Unlike mixtures, elements and compounds are ________ substances.
What is pure?
The Periodic Table contains 118 chemical symbols that represent these.
What are elements?
Two types of changes matter undergoes.
What are physical changes and chemical changes?
Used to represent elements on the Periodic Table.
What is a chemical symbol?
The formula for calculating average speed.
What is total distance divided by total time?
Made of only one type of atom.
What is an element?
What two measurements are required to calculate speed?
What are distance and time?
Always forms a new substance.
What is a chemical change?
A group of letters and numbers that show the elements present in a compound.
What is a chemical formula?
This is done in order to convert speed to velocity.
What is add the direction of motion?
Made of two or more elements chemically bonded together.
What is a compound?
This is the formula for sodium chloride (salt).
What is NaCl?
Matter goes through a change, but no new substance is formed.
What is a physical change?
The number of elements found in the formula NaHCO₃
What is four?
How far an object moves.
What is distance?
A substance containing two or more types of atoms that are NOT chemically bonded together.
What is a mixture?
A solid formed as the reaction of combining two or more liquids.
What is a precipitate?
Causes bonds between atoms to break, form or reform.
What is a chemical reaction/chemical change?
The number of atoms found in the formula Cu3(PO4)2
What is 13?
The distance between where you started and where you stopped.
What is displacement?
Two or more atoms held together by chemical bonds.
What is a molecule?
This formula is called dihydrogen monoxide.
What is H2O (formula for water)?
color change, change in temperature, evolution of a gas, formation of a precipitate, production of an odor
What is evidence of a chemical change?
Name the elements present in NaCl.
What are sodium and chlorine?
north, south, east, west, left, right, up, down, forward, backward
What are directions?