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| ability of an atom to attract electrons when the atom is a compound |
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| energy required to remove an electron from an atom |
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| one-half the distance between the nuclei of two atoms when the atoms are joined |
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element that is a good conductor of heat
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type of element characterized by the presence of electrons in the d orbital
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| a repitition of properties that occurs when elements are arranges in order of increasing atomic number |
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| type of ion formed by group 2A elements |
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| horizontal row in the periodic table |
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vertical column in the periodic table
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| subatomic particles that are transferred to form positive and negative ions |
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| a well tested explanation for a broad set of observations |
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| negative- gain electron- anion |
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| significant #s in addition |
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| answer will have the least number of decimal places as the original #s did |
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| significant #s in multiplication |
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Definition
| the answer will have the least # of significant #s as the original numbers |
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| Kelvins to degrees celcius |
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| Degrees celcius to Kelvins |
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| matter is made of small particles called atoms |
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•Conservation of Matter
•a compound will contain the same particles in the same proportion no matter its mass
•Atomic Theory |
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Term
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Definition
•all elements are composed of atoms
•atoms of an element are identical
•different atoms can combine to form compounds
•chemical reactions are created when atoms are joined, separated, or rearranged |
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| said nucleus contained protons and neutrons |
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| plum pudding model of atom |
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•said electrons were around the nucleus
•proposed the quantum numbers |
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orientation of the orbital
-2, -1, 0, 1, 2 |
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spin of electron
-1/2 or +1/2 |
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| electrons will be placed at the lowest energy level first, and go up from there (1s) |
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| Pauli Exclusion Principle |
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| no two atoms may have the same set of quantum numbers |
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| electrons enter each orbital before doubling up |
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wavelength= c/v
c= wavelength x frequency (v)
v= c/wavelength |
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electrons come down to level 1
UV light |
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drops to level 2
visible light |
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drops to level 3
infared light |
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| light has wave and particle properties |
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matter has wave and particle properties
wave character is important for electrons |
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