1) The basic particle from which all elements are made a) matter b) chemical properties c) atoms d) physical properties 2) Anything that has mass and takes up space. a) molecules b) matter c) atoms d) physical properties 3) A substance that contains one kind of atom and cannot be broken down into a simpler form. a) chemical properties b) elements c) mixture d) compounds 4) A neutral group of two or more atoms held together by a covalent bond. a) compounds b) neutrons c) substance d) molecules 5) A substance made of two or more elements chemically bound in a specific ratio or proportion. a) matter b) compounds c) protons d) atoms 6) Two or more substances that are together in the same place but their atoms are not chemically bonded. a) electrons b) mixture c) molecules d) elements 7) A characteristic of a pure substance that can be observed without changing into another substance. a) physical properties b) electrons c) compounds d) protons 8) A characteristic of a substance that describes its ability to change into different substances. a) protons b) electrons c) compounds d) chemical properties 9) A single kind of matter that is pure and has a specific set of properties. a) elements b) neutrons c) physical properties d) substance 10) positive charge; found in the nucleus a) compounds b) chemical properties c) substance d) protons 11) no charge, found in nucleus a) compounds b) protons c) neutrons d) elements 12) negative charge; found in the cloud or shell a) electrons b) substance c) mixture d) chemical properties 13) Atoms of the same element are essentially__________________ a) identical b) different 14) Atoms of different elements are _________________ a) identical b) different 15) What two particles are INSIDE THE NUCLEUS a) Protons and Electrons b) Electrons and Nucleus c) Protons and Neutrons 16) This Theory says that electrons do not follow orbits but move freely in clouds around the nucleus a) Valence Electrons b) Electron Cloud Model c) Nucleus Theory 17) Protons and Neutrons are made up of smaller particles called ________ a) Quakes b) Quarks c) Atoms 18) The Atomic Theory is the theory of ___________ a) Matter b) Mass c) Atoms 19) Electrons in the outermost shell of an atom are known as ______________ a) Rotating Electrons b) Valence Electrons c) Outter Shell 20) The weighted average of the masses of all naturally occurring isotopes of an element is known as the ________ a) Atomic Mass b) Atomic Number

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