Atoms
What charge do PROTONS have?
A POSITIVE CHARGE
The ATOMIC NUMBER is equal to the number of what?
PROTONS
What is the name given to the numbers that are changed in order to balance a chemical reaction?
COEFFICIENTS
When a SOLID becomes a LIQUID, what phase change has occurred ?
MELTING
Is WATER a POLAR or NON-POLAR molecule?
POLAR
Which sub-atomic particles have NO CHARGE
NEUTRONS
The ATOMIC MASS is equal to the number of what?
PROTONS and NEUTRONS
How many atoms of H (Hydrogen) are in the following chemical formula?
2NaH4O
8
When a GAS becomes a LIQUID, what phase change has occurred?
CONDENSATION
What is an ALLOY?
A SOLUTION of TWO METALS
How many electrons will fit in the FIRST SHELL of an atom?
2
What are the COLUMNS on the periodic table called?
GROUPS
What does the ARROW in a chemical reaction mean?
The DIRECTION of the REACTION
When a LIQUID becomes a GAS, what phase change has occurred?
EVAPORATION
If you INCREASE the pressure of a GAS, what happens to the VOLUME?
It INCREASES
What TWO sub-atomic particles are found in the NUCLEUS of an atom?
PROTONS and NEUTRONS
What are the ROWS on the periodic table called?
PERIODS
What are the compounds and molecules found at the beginning of a chemical reaction called?
REACTANTS
When a SOLID becomes a GAS, what phase change has occurred?
SUBLIMATION
In what state of matter are the particles tightly packed and vibrating in place?
A SOLID
What is the name given to the ELECTRONS in the outermost shell of an atom that form chemical bonds with other elements?
VALENCE ELECTRONS
What GROUP of elements on the periodic table NO NOT BOND with other elements?
THE NOBLE GASES
What are the compounds and molecules found at the END of a chemical reaction called?
PRODUCTS
When a GAS becomes a SOLID, what phase change has occurred?
DEPOSITION
What does the LAW OF CONSERVATION OF MASS/ENERGY STATE?
MASS/ENERGY CAN NEVER BE CREATED OR DESTROYED, BUT CAN CHANGE FORMS