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chemistry regents review

Things to know for Chem Regents

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Chemistry
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chemistry regents review

200 Things to Know to Pass the Chemistry Regents 1. Protons are positively charged (+) with a mass of 1 amu. Example: Which has the greatest nuclear charge? Cl-35 Ar-40 K-39 Ca-40 2. Neutrons have no charge and a mass of 1 amu. 3. Electrons are small and are negatively charged (-) with a mass of almost 0 amu.. 4. Protons & neutrons are in an atom?s nucleus (nucleons). Which has the greatest number of nucleons? Sn-119 Sb-122 Te-128 I-127 5. Electrons are found in ?clouds? (orbitals) around an atom?s nucleus. Where is most of the mass of an atom found? Where is most of the size (volume) of an atom found? 6. The mass number is equal to an atom?s number of protons and neutrons added together.
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