Flashcard Set Preview
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| 1 |
law of conservation of matter
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matter is neither lost nor gained during a chem reaction
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| 2 |
law of definite proportions
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in a compound, the constituent elements are always present in a definite proportion by weight
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| 3 |
proton
neutron
electron
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positvely charge
neutral
negatviely charged
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| 4 |
nucleus
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small central core of the atom, contains the protons and neutrons
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| 5 |
radioactivity
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spontaneous decompostition of unstable atomic nuclei
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| 6 |
alpha particle
beta particle
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positively charge particle emitted by certain radioactive isotopes
an electron ejected...
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| 7 |
gamma ray
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high energy electromagnetic radiation emitted from radioactive isotopes
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| 8 |
atomic number
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number of protons in nucleus
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| 9 |
mass number
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neutrons + protons
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| 10 |
isotopes
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atoms of an element w/ different mass numbers due to different numbers of neutrons
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| 11 |
atomic weight
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average atomic mass of an element's isoptopes weighted by percentage abundance
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| 12 |
continuous spectrum
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spectrum that contains radiation distributed over all wavelengths
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| 13 |
quantum
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smallest increment of energy
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| 14 |
ground state
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condition of atom in which all electrons are in their normal, lowest energy level
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| 15 |
excited state
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unstable, higher energy state of an atom
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| 16 |
valence electrons
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outermost electrons in an atom
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| 17 |
shell =
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2n2
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| 18 |
group
period
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vertical column
horizontal row
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| 19 |
metal
nonmetal
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element that conducts electric current
doesn't conduct electrical current
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| 20 |
insulator
metalloid
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poor conductor of heat and electricity
element w/ properties intermediate between...
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| 21 |
cation
anion
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positive charge
negative charge
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| 22 |
penny in nitric acid
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turns blue
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| 23 |
basic science
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purusit of knowledge about the universe w/ no short term practical objectives for application...
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| 24 |
applied science
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well defined, short term goal of solving a specific problem
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| 25 |
column letters
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s, p, d, f
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| 26 |
acid vs base
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base = pink
~phenolphthalein
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| 27 |
wave lengths
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distance between correpsonding points on adjacent waves
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| 28 |
electromagnetic radiation
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travels at the same velocity: the speed of light
= 3.00 x 108 m/s
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| 29 |
wave lengths
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gamma rays - x rays - ultra violet - visible - infrared- microwave - radio frequency
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