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Practice 2
atom
| Question | Answer |
|---|---|
| atomic theory | a theory of the nature of matter: all material substances are composed of minute particles or atoms of a comparatively small number of kinds and all the atoms of the same kind are uniform in size, weight, and other properties |
| electrical charge | a physical property of matter that causes matter to experience a force when placed in an electromagnetic field, can be positive or negative; like charges repel each other and unlike charges attract each other |
| electron | a negatively charged subatomic particle that can be either free (not attached to any atom) or bound to the nucleus of an atom and has negligible mass; determines the chemical reactivity of an element |
| electron cloud | the system of electrons surrounding the nucleus of an atom |
| the system of electrons surrounding the nucleus of an atom | |
| mass (atomic) | the quantity of matter contained in an atom of an element, measured in atomic mass units (amu) |
| neutron | a non |
| nucleus (atomic) | the positively charged center of an atom, composed of neutrons and protons, and possessing most of the mass but occupying only a small fraction of the volume of the atom |
| detectable events that are observed through the senses or technology; can be explained through scientific laws, ideas, principles, and theories | |
| phenomena | detectable events that are observed through the senses or technology; can be explained through scientific laws, ideas, principles, and theories |
| a positively charged subatomic particle found in the nucleus of an atom, the mass is 1 atomic mass unit (amu); determines the identity of an element | |
| proton | a positively charged subatomic particle found in the nucleus of an atom, the mass is 1 atomic mass unit (amu); determines the identity of an element |
| proton | a positively charged subatomic particle found in the nucleus of an atom, the mass is 1 atomic mass unit (amu); determines the identity of an element |
| phenomena | |
| detectable events that are observed through the senses or technology; can be explained through scientific laws, ideas, principles, and theories | |
| proton | |
| a positively charged subatomic particle found in the nucleus of an atom, the mass is 1 atomic mass unit (amu); determines the identity of an element | |
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