Show:
Atoms/PTOE
Physical properties of matter
Chemical Properties of matter
Chemical reactions
Acids and Bases
100
What is the symbol K?
Pottasium
100
Is density an intensive or extensive property?
Intensive
100
What is a chemical property?
A property that can be observed only if the substance undergoes a change into another substance.
100
When do chemical reactions occur?
When electrons combine with each other
100
Atoms that have a loss or gain of electrons are called?
Ions
200
How many electrons can the second energy level hold?
8 electrons
200
Physical properties are divided into what two categories?
Intensive and extensive
200
Which is an example of a chemical property: Color Mass Flammability Luster
Flammability
200
Chemical reactions form new ______?
substances
200
Name 2 characteristics of Acids
Acids taste sour Acids react strongly with metals Strong acids can burn your skin
300
What is an atom?
The smallest unit of an element that retains the chemical properties of the element.
300
What are extensive properties?
Those that depend on the amount of matter present.
300
What is a chemical change?
New substances with new properties are formed.
300
What holds chemicals together?
Chemical bonds
300
Name 2 examples of an Acid
Vinegar Citrus Fruits Stomach Acid
400
What is the atomic number?
The number of protons in the nucleus of the atom of a given element.
400
What does SI stand for?
System International
400
Which changes are not easily reversed?
Chemical changes
400
The faster the molecules the _____ the pressure?
Higher
400
What is a base?
An ionic compound that breaks apart to form a negatively charged hydroxide ion
500
What is the atomic mass number?
The number of protons plus the number of neutrons.
500
What are intensive properties?
Properties that don't depend on the amount of matter present.
500
Which is not evidence of a chemical change? change in color (rust) energy released (exothermic) change in shape (milk to butter)
change in shape
500
Carbon dioxide can be a liquid if its stored under____?
high pressure
500
What happens when acids and bases are added to each other?
They neutralize