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45 Cards in this Set
- Front
- Back
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What Greek philosopher Coined the term atoms?
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Democritus
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What are the 3 parts of John Dalton's atomic theory?
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1. EVERYTHING is made of atoms
2. Atoms of the SAME element are ALIKE 3. Atoms of DIFFERENT elements form Molecules |
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Whose atomic theory stated electrons move in orbits called energy levels?
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Niels Bohrs
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What are atoms made of?
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Nucleus - center
protons + (positive) and Neutrons (no charge) electrons orbit the atom - (negative) |
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What atomic theory states that it is impossible to determine the exact position of an electron?
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The Modern Theory of the Atom
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Where are electrons found?
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in Orbitals
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How many electrons can each orbital hold?
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2
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What are the sublevels that energy levels can be broken up into?
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s
p d f |
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What are the electrons in the outermost energy level?
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Valence Electrons
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What does the Periodic Law state?
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properties of elements change in a pattern when they are arranged in increasing atomic number
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What are Horizontal Rows called?
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periods
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What are Vertical Columns Called?
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groups
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What happens when an atom gains or loses electrons?
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ionization
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What are positively charged ions called?
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cations
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What are negatively charged ions called?
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anions
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Why do atoms lose or gain electrons?
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So that they can have 8 valence electrons in their outer energy level
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What does the Atomic Number tell you?
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The number of protons an atom has.
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True or False
The atomic number is unique for every atom. |
TRUE
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Where can the mass number be written?
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after the name of an element
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What do we call any atoms having the SAME number of protons but DIFFERENT number of neutrons?
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Isotopes
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True or False?
Average atomic mass for an element is the average for all isotopes. |
TRUE
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What is the most reactive metal?
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Francium
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What is the most reactive Nonmetal?
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Fluorine
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Where do you find Semiconductors?
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between metals and nonmetalss
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What can be found in Group 17?
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elements called halogens
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What can be found in Group 18?
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elements called the Noble gases
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Who came up with the Atomic Theory?
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John Dalton
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How many electrons can an orbital hold?
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2
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What atomic theory says that elctrons move in ORBITALS?
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MODERN THEORY OF THE ATOM
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The atomic number is the number of what?
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Protons
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The mass number is the number of what?
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protons & neutrons
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What family have 8 valence electrons & are the "snobs" of the periodic table?
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Noble Gases
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Oxygen & Ozone are different forms of the same element so are diamonds and carbon and know as what?
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Allotropes
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Why do alkaline metals get more reactive as they go down the Periodic Table?
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Valence electrons are further out so they are easier to take away.
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What is the code used for Quantum numbers?
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s p d f
0 1 2 3 |
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How many numbers do you use in finding Quantum numbers?
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4
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What do the Quantum numbers tell you?
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The location of an electron
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What does the first Quantum number tell you?
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The energy level
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What does the second number tell you?
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the sub-level
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What does the third number tell you?
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The orbital
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What does the 4th number tell you?
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Which electron
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What happens to alkaline earth metals as you move down the table?
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They get more reative
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What charge do protons have?
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positive
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What charge do neutrons have?
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no charge
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What charge do electrons have?
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negative
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