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How many neutrons does oxygen have if it has 8 protons and a mass number of 16?
8
List some chemical Reaction Signs
Color change, gas production, or temperature change indicate reactions.
Rusting of nails is a chemical reaction. True or False
True
When the equation Ca + H2---->Ca2H2  is correctly balanced using the smalled whole numbers, the coefficient of Ca is?
2
What does  an equation correctly look like if following the  Conservation of Mass?
Balanced equations have equal atom counts on both sides.
What is the law of Conservation of Mass?
Mass cannot be created or destroyed
How many electrons are allowed on the first ring of the electron cloud?
Maximum of 2 electrons allowed in this level.
What is the Symbol for Silver?
Ag is the symbol for silver.
The verticle columns of the Periodic Table are called?
Periods
What are the majority of elements in the Periodic Table classified as?
Most elements are classified as metals.
What is the Nucleus composed of?
All atomic nuclei contain protons and neutrons.
An atom Sulfur has 16 protons and 16 neutrons. What is the Atomic Mass of Sulfur?
Approximately 32 due to 16 protons and neutrons.
What are some Proton Characteristics?
Protons are positively charged and determine element identity.
How do you find the Atomic Mass?
Mass number is protons plus neutrons combined.
What is an Isotope?
Isotopes have the same number of protons but different number of neutron.
True or False: Electrons are much lighter than protons.
True
Neutron vs Electron
Neutrons are neutral; electrons are negatively charged.
How do you determine the number of Neutrons?
Calculated by subtracting protons from mass number.
How do you determine the number of Protons?
Determined by the atomic number of an element.
Most of Atom's Volume  is Composed of?
Empty space
Describe an Electron
Electrons are subatomic particles surrounding the nucleus with negative charge.
We are Valence Electrons found?
Electrons in the outermost shell of an atom.
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