22 Multiple Choice 0.5/1 "Which of the following are reasons why it must only be electrons that move when an atom becomes an ion? (Mark all that apply) Electrons are negative O Protons are positive Protons are stuck in the center of an atom while electrons move easily about the outside of an atom O Electrons are smaller than protons and neutrons Protons determine the identity of an element Neutrons are neutral Schoology Support | Schoology Blog | PRIVACY POLICY | Terms of L

Q: pH = 12.1 Express your answer using one significant figure. ? [H;O*]= M

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Q: Hi, the answer is 0.105 M.

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.