Chemical vs Physical Reactions
Is an ice cube melting a physical or chemical reaction?
Physical
How many total atoms are in H20
3
Anything lower than a 7 is
An acid
Where is the nucleus located in an atom
At the center
What is an element
A pure substance made of only one type of atom
Is vinegar and baking soda coming together to form C02 a chemical or physical reaction?
Chemical
What does a coefficient tell us?
How many molecules there are of a compound
Anything higher than 7 is
A base
Positive
What does the law of conservation of mass tell us?
Matter can not be created or destroyed
When elements come together to form a new substance is that a chemical or physical reaction?
Chemical Reaction
What does a subscript tell us
How many atoms there are of an element in a compound
A 7 is considered
Neutral
What charge does an electron have?
Negative
What is a synthesis?
When two or more elements or compounds combine
When a substances changes its state of matter, is that a physical or chemical reaction?
Physical
How many Carbon atoms are there in 3CO2
3
Water
What types of elements are in an ionic bond?
Metal and nonmetal
What is an endothermic reaction?
When energy is absorbed and temperature decreases
Is a candle burning a physical or chemical reaction
Chemical
How many Hydrogen atoms are in C6H12O6
12
What is it called when an acid and base combine?
Neutralization
What types of elements are in a covalent bond?
Two nonmetals
DAILY DOUBLE
When energy is released and temperatures increase?