Which of the following describes an atom?
A. smallish units of two hydrogen joined together
B...
Chemistry, 13.08.2021 17:00 Mackjrmario
Which of the following describes an atom?
A. smallish units of two hydrogen joined together
B. 6 protons six neutrons in the nucleus and six electrons in the electron cloud
C. hydrogen chemically combined with an oxygen
D. 6 protons 6 neutrons in the nucleus and seven electrons in the electron cloud​
Answers: 2
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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
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When hydrochloric acid reacts with potassium hydroxide solution, the following reaction occurs. hcl (aq) + koh (aq) h2o (l) + kcl (aq) the reaction gives off heat energy, so it is an reaction.
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How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.
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