Subatomic Particles
The three subatomic particles
Protons, neutrons, and electrons
The number of protons in an atom; also the numbers that Periodic Table is organized by
Atomic number
The smallest particle of an element; made from protons, neutrons, and electrons
Atom
The number of atoms of hydrogen there are in a water molecule (H2O)
2
A property that can be seen/observed without changing the identity of a substance.
Physical property
This subatomic particle has a negative charge
Electron
A neutral atom has the same number of protons and...
Electrons
The state of matter that has a definite shape and volume
Solid
The number of neutrons in an atom with an atomic mass of 12 that has 6 protons
6
A property that can only be measured when undergoing a chemical change.
Chemical property
This subatomic particle is neutral (has no charge)
Neutron
Protons plus neutrons
Atomic mass
Element
The notation for molecules; tells you what atoms are present (ex. NaCl)
Chemical formula
A change that is often reversible and does not change the chemical composition of a substance.
Physical Change
This subatomic particle has a positive charge
Proton
The element that only has 1 proton in its nucleus
Hydrogen
The state of matter that has the highest thermal energy.
Gas
The number of carbon atoms in 2 C6H12O6
12
A change that is often not reversible and does change the chemical composition of a substance.
Chemical change
This subatomic particle does NOT have significant mass
Electron
The two subatomic particles that we add together to get atomic mass.
Protons and neutrons
The state of matter with a definite volume but no definite shape (takes the shape of its container).
Liquid
H2 + O2 --> H2O
2H2 + O2 --> 2H2O
A property that does not depend on the amount of matter in an pbject.
Intensive Property