| constant motion | 0.58 |
| the ground state | 0.57 |
| gas | 0.54 |
| turn | 0.52 |
| the brain | 0.52 |
| specified group | 0.48 |
| the specified compute g… | 0.47 |
| excited state | 0.47 |
| each molecule | 0.37 |
| two places | 0.35 |
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| consist of proton | 0.77 |
| consist of nucleus | 0.71 |
| lose electron | 0.69 |
| form molecule | 0.68 |
| interact with each other | 0.66 |
| emit energy | 0.63 |
| make up our bodies | 0.63 |
| form bond | 0.63 |
| make up planet | 0.62 |
| share valence electrons | 0.61 |
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| electron | 0.73 |
| same number of protons | 0.71 |
| nucleus | 0.70 |
| neutron | 0.70 |
| same atomic number | 0.67 |
| one proton | 0.64 |
| structure | 0.63 |
| mass | 0.63 |
| eight electrons | 0.62 |
| six electrons | 0.61 |
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| change | 0.48 |
| variable number of elec… | 0.39 |
| minuscule objects | 0.31 |
| the simplest substances | 0.27 |
| substance | 0.25 |
| proton | 0.72 |
| same substance | 0.48 |
| quark | 0.45 |
| energy | 0.44 |
| subatomic particles | 0.42 |
| positive nucleus | 0.36 |
| invisible energy | 0.31 |
| vibrating packets of en… | 0.25 |
| millions of organisms | 0.41 |
| the biophore | 0.25 |
| composed of electron | 0.83 |
| composed of neutron | 0.81 |
| composed of proton | 0.75 |
| excited | 0.69 |
| ionized | 0.69 |
| arranged | 0.67 |
| composed of nucleus | 0.67 |
| held by covalent bonds | 0.66 |
| constructed | 0.66 |
| moved | 0.65 |
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