Building Blocks of Matter
Anything that has mass or takes up space is called this.
Matter
A change that alters the appearance of a material but does not make the material into another substance.
PHYSICAL CHANGE
A substance has one atom of sodium and one atom of chlorine. What is the chemical symbol for the element?
NaCl
The materials you have at the beginning of a chemical reaction.
REACTANTS
Bubbling and the formation of a gas is a sign of what?
A chemical reaction OR chemical change
A substance that is made of only one type of atom and cannot be broken down into any other substance.
ELEMENT
A change in matter that produces new substances.
CHEMICAL CHANGE
A combination of symbols that represent the elements in a compound.
CHEMICAL FORMULA
The materials you have at the completion of a reaction.
PRODUCTS
The 2 in the product of the balanced equation
H2 + Cl2 --> 2HCl is called a what?
A coefficient
A substance made of two or more elements ionically bonded in a specific ratio, or proportion.
COMPOUND?
The melting of ice cream is an example of what type of change.
PHYSICAL CHANGE
Shows the number of atoms of an element in a molecule.
SUBSCRIPT
The arrow in a chemical equation is read as this.
YIELDS
A student reacts baking soda with vinegar. The mass of her products is LESS than the mass of her reactants. What might have happened?
The gas created in the reaction escaped and could not be measured.
One is made of components that you can easily distinguish (see) and separate, and one is made of components that you cannot tell apart.
heterogeneous and homogeneous mixtures, in this order
A solid that forms from solution during a chemical reaction.
PRECIPITATE
Shows the number of compounds in a chemical equation.
COEFFICIENT.
Balance the following equation:
__ N2 + __ H2 → __ NH3
N2 + 3 H2 → 2 NH3
(1, 3, 2)
The tool that is used to measure mass of substances.
A balance OR triple-beam balance?
The Law of Conservation of Mass
that states that matter cannot be created/made or destroyed/lost.
Give two types of evidence for chemical reactions.
COLOR CHANGE, GAS PRODUCTION, CHANGES IN TEMPERATURE, CHANGES IN PROPERTIES, NEW SUBSTANCE
The number of atoms total in aluminum (Al) phosphate (PO4), if the chemical formula is AlPO4.
6 atoms total
Balance the following equation:
__ C3H8 + __ O2 --> __ CO2 + __ H2O
C3H8 + 5 O2 --> 3 CO2 + 4 H2O
(1, 5, 3, 4)
Balance the chemical equation:
___SnO2 + ___H2 ----> ____Sn + ____H2O
___SnO2 + _2__H2 ----> ____Sn + __2__H2O