Chemistry, 15.08.2021 01:00 mariahrpoulin9630
a hydrogen atom usually consists of 1 proton and 1 electron. a helium atom usually contains 2 protons, 2 neutrons, and 2 electrons. compare the mass of 2 hydrogen atoms to the mass of 1 helium atom.
Answers: 1
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Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change
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Chemistry, 23.06.2019 00:10, Rubendelarosa1529
Covalent compounds: mastery test select the correct answer what is formed when atoms join together with a covalent bond? a. an ion b. a molecule c. a neutral atom d. a noble gas
Answers: 3
a hydrogen atom usually consists of 1 proton and 1 electron. a helium atom usually contains 2 proton...
Spanish, 07.11.2019 01:31