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level: Level 1

Questions and Answers List

level questions: Level 1

QuestionAnswer
What is an atom?smallest particle of an element that maintains the properties of that element
What is atomic mass?average mass number of all atoms of an element (from particles in the nucleus)
What does the atomic number represent?the number of protons in the nucleus of an atom; used to determine an element's position in the Periodic Table
What is a chemical property?a characteristic of a substance that describes how it combines with other substances to form new ones
What is an electrical charge?a property of a subatomic particle; positive (protons), negative (electrons), or neutral (neutrons)
What is an electron?a negatively charged particle in the electron cloud surrounding the atomic nucleus
What is an electron cloud?the negatively charged space containing electrons that surrounds the atomic nucleus
What is an element?a pure substance that cannot be broken down chemically into simpler substances
What are groups (families)?the vertical columns on the Periodic Table
What is a mass number?total number of protons and neutrons in a specific atom