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Ch2 Part1 Basic Chem
| Question | Answer |
|---|---|
| anything that occupies space and has mass | Matter |
| equal to matter in the object | mass |
| remains constant regardless of gravity | mass |
| solid, liquid, gas | three states of matter |
| the capacity to do work, and exists in two forms | energy |
| energy of motion | kinetic |
| stored energy | potential |
| chemical, electrical, mechanical, radiant | four types of energy |
| energy stored in chemical bonds | chemical energy |
| results from the movement of charged particles | electrical |
| energy directly involved with moving matter | mechanical |
| energy that travels in waves | radiant |
| energy is... | easily converted from one form to another |
| substances that cannot be broken down into simpler substances by ordinary chemical means | elements |
| carbon, hydrogen, nitrogen, oxygen | make up roughly 96% of body weight |
| smallest particle of element retain characteristics of element | atoms |
| elements are designated by.. | 1, 2, or 3 letter abbreviation called the atomic symbol |
| each atom has a central -packed with protons and neutrons | nucleus |
| positive charge weighs 1 amu | proton |
| no charge weighs 1 amu | Neutrons |
| found around the nucleus negative charge weightless | electrons |
| protons= | electrons |
| atoms are electrically.. | neutral |
| 2D model of atomic structure | Planetary model |
| 3D model talking about orbital regions, not orbital patterns | orbital model |
| elements are identified based on | their number of protons, electrons, neutrons |
| atomic number= | # of protons in an element |
| same number of protons and electrons of the same element | isotopes |
| average of the relative weights of all isotopes of an element | atomic weight |
| heavier unstable isotopes of an element that spontaneously decompose into more stable forms | radioisotopes |
| time required for a radioactive isotope to lose 1/2 of it's radioactivity | half-life |
| combination of 2 or more atoms | molecule |
| 2 or more atoms of the same element combined | molecule of that element |
| 2 or more atoms of difference elements combined | molecule of a compound |
| substances made of two ore more components mixed physically | mixture |
| homogeneous mixtures of compounds that may be liquids, gases, or solids | solution |
| greatest amounts | solvents |
| smaller amounts | solutes |
| may be described by its concentration expressed as % or in terms of molarity | solutions |
| heterogeneous mixtures | colloids or emulsions |
| heterogeneous mixtures with large (often) visible solutes that tend to settle out | suspensions |
| difference between mixtures and compounds | chemical bonding does not occur in mixtures |
| can be separated into chemical components by physical means | mixtures |
| separation is done by chemical means | compounds |
| an energy relationship between electrons of the reacting atoms | chemical bond |
Created by:
jennipehrdee
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