Read each statement below and identify all true statements. Circle all correct answers.

Question

Read each statement below and identify all true statements.  Circle all correct answers.

BlackTom AI · Accepted Answer

Restating the task: Read each statement and identify which are true from the list of options provided.
Option 1: 'Electrons have a much higher mass than neutrons and protons.' This is incorrect because electrons have a mass that is about 1/1836 that of a proton, and far less than that of a neutron; the statement overstates the electron mass relative to nucleons.
Option 2: 'Isotopes are atoms of an element that have different numbers of protons.' Isotopes differ in neutron count, not proton count; the number of protons (the atomic number) defines the element, so this statement is false.
Option 3: 'The valence electrons of a carbon atom are located in the second shell.' This is true: carbon has electron configuration 1s2 2s2 2p2, placing its valence (outermost) electrons in the second shell.
Option 4: 'Electrons and protons have charges of the same magnitude but opposite signs.' This is true: electrons carry a negative charge, protons a positive charge, with equal magnitude in elementary charge units.
Summary of reasoning: The first two statements contain factual inaccuracies about atomic structure (mass comparison and isotope definition), while the last two correctly describe electron mass relative to nucleons, isotope terminology, and fundamental charge properties. The true statements are those that accurately reflect electron masses, isotope definitions, electron shell structure for carbon, and equal but opposite charges of electrons and protons.

Read each statement below and identify all true statements. Circle all correct answers. 多项选择题

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