_________________________ is the table that organizes all of the known elements.
The Periodic Table of Elements
The atomic number of an element is equal to:
________________ and _________________
# of protons and # of electrons
How many protons are in the element Bromine (Br)?
35
Classify the following elements as either metals, nonmetals, or metalloids: Cd, Br, Cu, P, Si
Metals: Cd, Cu
Nonmetals: Br, P
Metalloid: Si
The atomic mass of an element is equal to:
The # of protons + the # of neutrons in the nucleus
How many protons, electrons, and neutrons are in the element Argon (Ar)?
Protons = 18
Electrons = 18
Neutrons = 22
How many atoms are in one H2O molecule?
3
What are 3 properties that metals have?
Luster, malleable, ductile, good conductors of heat & electricity, reactivity
How can you find the number of protons, electrons, and neutrons in an atom, using the Periodic Table?
# of protons = atomic number
# of electrons = atomic number
# of neutrons = atomic mass - atomic number