1) What is the smallest particle of matter called? a) atom b) element c) dust d) proton 2) What is the central part of an atom called? a) electron cloud b) proton c) nuclues d) nuetron 3) What is the charge of a proton? a) negative b) positive c) no charge d) neutral 4) What subatomic particle has no charge? a) protons b) neutrons c) electrons d) electron cloud 5) What is the relative mass of an electron compared to a proton? a) Twice as much b) 5 times as much c) Equal d) It has no mass 6) What determines the atomic number of an element? a) The mass of the element. b) The number of electrons. c) The number of nuetrons. d) The number of protons. 7) Where are the electrons positioned in an atom? a) Around the electron cloud. b) In the nucleus. c) With the protons. d) With the neutrons. 8) What is the maximum number of electrons that can occupy the first energy level of an atom? a) 4 b) 2 c) 8 d) 16 9) What is the term for the outermost electrons in an atom? a) bonding electrons b) free electrons c) valence electrons d) core electrons 10) What is the charge of an atom that gains an electron? a) positive charge b) no charge c) positive/negative charges d) negative charge 11) How is the mass of an atom determined? a) By the number of protons and neutrons. b) By the number of electrons and neutrons. c) By the number of electrons and protons. d) No of the above. 12) What is the name of the model that describes electrons in specific energy levels around the nucleus? a) Rutherford Model b) Bohr Model c) Dalton Model d) Quantum Model 13) What is the term for atoms of the same element with different mass numbers? a) Ions b) Molecules c) Isotopes d) Compounds 14) What is an element? a) matter that is made up of two kinds of atoms. b) Matter that is a mixture of substances. c) Matter that is made of three kinds of atoms chemically combined. d) Matter that is made of only one type of atom. 15) What is the smallest particle of an element that retains its chemical properties? a) atom b) molecule c) proton d) electron 16) What is a compound? a) Contains atoms of the same element chemically combined. b) Atoms of different elements chemically combined. c) Atoms of different elements physically combined. d) None of the above. 17) What is a mixture? a) A substance that contains the same atoms physically combined. b) A substance that can contain many particles that are physically combined. c) A substance that contains atoms and molecules that are chemically combined. d) All the above. 18) What does the Atomic Theory state? a) That all matter is made up of the same atoms. b) That all matter is made of elements. c) That all matter is made up of atoms. d) That all matter is made from compounds. 19) What does the Conservation of Matter state? a) That matter cannot be created or destroyed. b) That matter exists because of man. c) That matter can be destroyed. d) All the above. 20) What is the maximum number of electrons that can occupy the second energy level in an atom? a) 2 b) 4 c) 6 d) 8 21) What do atoms and cells have in common? a) They both have a nucleus. b) They both have electrons. c) They both have protons. d) They both make up all matter.

Atomic Structure

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