| the nucleus | 0.64 |
| the nucleus of an atom | 0.53 |
| the center of the atom | 0.35 |
| atom | 0.32 |
| bone | 0.25 |
| repel each other | 0.69 |
| pass through the membra… | 0.67 |
| attract each other | 0.61 |
| make up atom | 0.60 |
| get close | 0.53 |
| remain in the nucleus | 0.52 |
| repel other protons | 0.50 |
| stop inside the body | 0.48 |
| release energy | 0.47 |
| form the nucleus of the… | 0.47 |
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| positive charge | 0.84 |
| same charge | 0.56 |
| positive electrical cha… | 0.56 |
| neutron | 0.55 |
| charge | 0.53 |
| electron | 0.51 |
| velocity | 0.48 |
| mass | 0.47 |
| opposite charges | 0.42 |
| two upquarks | 0.41 |
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| two up quarks | 0.77 |
| quark | 0.59 |
| down quark | 0.44 |
| charged | 0.79 |
| composed of one down qu… | 0.72 |
| converted into neutron | 0.68 |
| made | 0.63 |
| released | 0.56 |
| transferred | 0.54 |
| deposited in luman | 0.54 |
| composed of three quarks | 0.54 |
| removed | 0.44 |
| bound | 0.44 |
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