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9 Cards in this Set
- Front
- Back
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A negatively charged particle moving around the nucleus of an atom |
electron |
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A positively charged particle in the nucleus of an atom |
proton |
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Why does an atom have no net electric charge ? |
The positively charged protons cancel out the negatively charged electrons. |
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Isotope |
An element with differing number of protons and neutrons |
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Compared to the charge and mass of a proton, an electron has.... |
opposite charge and smaller mass |
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A proton has approximately the same mass as _________. |
a neutron |
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The electron cloud is a visual model of the probable locations of electrons in __________. |
an atom |
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The nucleus is made of _______________. |
protons and neutrons |
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If atoms of a halogen nonmetal (Group 17) gain one electron, the atoms then have 8 ___________. |
valence electrons |
