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11 Cards in this Set
- Front
- Back
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atom
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basic building block of matter, smallest unit of chemical element
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What is the atom composed of?
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protons, neutrons, and electrons (subatomic particles)
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Protons and neutrons form the
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nucleus
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The electrons exist outside the nucleus in regions of space called
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orbitals
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What shows similar chemical properties and cannot be broken down further by chemical means?
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element
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What is the charge and mass of a proton?
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positive and 1 atomic mass unit
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atomic number
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number of protons found in an atom of that element
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What is charge and mass of neutron?
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no charge and mass slightly different than proton
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isotope
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different number of neutrons but same number of protons.
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mass number
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equal to the number of protons and neutrons
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Convention X with Z on bottom and A on top
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X is the element
Z is the atomic number A is the mass number |
