KSA Science Grade 7 Practice Questions - Kentucky Summative Assessment Science - Grade 7 Exam

Which statement best describes the fundamental structure of an atom?

A nucleus of protons and neutrons surrounded by electrons in motion A solid sphere composed entirely of positively charged electrons An outer shell of neutrons surrounding a nucleus of protons and electrons A mix of liquid water and dissolved mineral ions

Correct Answer:

A nucleus of protons and neutrons surrounded by electrons in motion

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