Vocab
the amount of matter something has
What is mass?
A change in matter that doesn't create a new substance
What is Physical change?
Made up of all the same atoms; H, Pb, Ti are examples of this.
What is an element?
H20 and CO2 are examples of ___________________ that are used to represent chemical compounds.
What is a chemical formula?
The amount of space an object takes up.
What is Volume?
Which change occurs when you bake cookies?
What is a chemical change?
The first element on the periodic table is hydrogen. Name its atomic symbol.
What is H?
Which gas makes up the majority of the atmosphere?
Hydrogen
Nitrogen
Oxygen
What is Nitrogen?
this is the temperature at which a substance goes from a liquid to a gas
What is boiling point?
Melting wax, ice, and metal are all what type of changes
What are physical changes?
The number of protons is usually equal to the number of
What are electrons?
Atoms packed closely together in this state
What is a solid?
this is the relationship between mass and volume
What is density?
Dissolving sugar into lemonade and bending a wire are all examples of this
What are Physical changes?
If Carbon has an atomic number of 6, how many PROTONS are in an atom of Carbon?
6
Which elements make up the oceans
What is hydrogen, oxygen, sodium, and chlorine?
All matter is made up of this.
What is atoms?
Shape and density are examples of this
What are physical properties?
Which subatomic particles make up the nucleus?
What are protons and neutrons?
CO2 is the chemical formula for carbon dioxide. Name the amount of atoms that make up a molecule of CO2.
What is three?
Pure substances are ______ and compounds.
What are elements?
Flammability and reactivity are examples of this
What is chemical properties?
How do you calculate the number of neutrons?
atomic mass - atomic number (# of protons) = # of neutrons
The positively charged particles in an atom are called
What is protons?