Gen Chem Atomic Structure
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Name the three subatomic particles of an atom and identify thier charge.
- Protons are positive
- Neutrons are neutral
- Electrons are negative
Name the three subatomic particles of an atom and state thier mass.
- Proton mass is 1 amu
- Neutron mass is 1 amu
- Electrons have no mass
What is the charge of the nucleus of an atom?
Atoms, as listed on the periodic table, have what charge?
Atoms are electrically neutral
Why is the mass on the table not a whole number?
Mass listed is an AVERAGE atomic mass of all the isotopes
How does one calculate the number of neutrons in an atom?
Atomic mass minus atomic number
How does one find the number of protons of an atom?
Atomic number on the periodic table
What are two ways to find the number of electrons an atom has?
Number of electrons is equal to the number of protons OR add up the electron configuration listed on the per table
How does an ion form?
When an atom loses or gains an electron
Has a K+1 ion gained or lost an electron?
Lost an electron
What uniquely identifies an element?
How many electrons does a fluoride ion have?
10 (Fluorine is atomic # 9, F-1 gains one)
How many electrons does a copper (II) ion have?
27 (copper has 29 , Cu+2 has lost 2)
What term is used for atoms of the same element that have different masses?
What two types of matter are considered pure substances?
Elements and compounds
What type of compound, ionic or molecular, exist as individual particles?
What does it mean that water is a polar molecule?
One end has a positive charge and the other has a negative charge
What type of compound, ionic or molecular, exist as repeating formula units that make up a crystal?
The negative ion of a cmpd
The positive ion
What is the total electrical charge of a compound?
How do you write the formula for calcium bromide? Give the cation, the anion and the formula
Ca 2+ Br-1 CaBr2
Using Reference table E, what is the formula for potassium sulfate. Give the cation, anion and formula
K+1 SO4 2- K2SO4
What is the name of the compound Fe(NO3)2
iron (III) nitrate
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