An atom contains one proton one electron and one neutron Which two particles are most similar in mass?
the neutron and the electron
the proton and the electron
the proton and the neutron
the neutron and the atom
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In the analysis of hair and fiber samples, which does a compound comparison microscope allow for that a conventional compound microscope does not? a. simultaneous observation b. polarization c. fluorescence d. higher magnification

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

What does a complete balanced chemical equation include? a. exothermic coefficients b. endothermic coefficients c. valence electrons d. molar coefficients