Atoms
The Element's Identity
We find elements here
Periodic Table
Friction is a contact force that
resists between 2 surfaces
In the formula "H2O" the "2" is known as
A subscript
What are valence electrons?
Electrons found on the outermost part of the atom
What is the number of electrons equal to?
Protons
Periodic Table period go this direction
Left to right
A non-contact force is a
push or pull on an object without touching it
To make chemical equations have the same number of atoms on both sides, you must
Balance them
What is between subatomic particles in the electron cloud?
Neutral
True or False. All elements in the universe have been discovered.
False
This force is found throughout the universe.
This force gets stronger the closer you are to an object and the larger that object's mass is.
Gravity
The symbols in Chemical equations represent
Elements
F = M x A
How would we calculate Mass, if we only had Acceleration and Force?
Divide the Force by the Acceleration
Which are smallest? Protons, electrons, or neutrons?
Electrons
True
What is velocity?
Speed and Direction
In the formula 2H4O, the 2 is known as the coefficient. Coefficients tell us the number of
Molecules
What is the most abundant element in the Universe?
Hydrogen
Atomic Number = Protons = Electrons
Atomic Mass- Atomic Number = Number of Neutrons
The periodic table is made up mostly of
(metals) (non-metals) (metalloids)
Metals
What is inertia?
An object's resistance to a change in it's motion
Chemical equations help us know what?
How substances in the universe are made up.
What does it mean if an atom is "ionized"
When it gains a positive or negative charge