1) All matter is made of _____. a) atoms b) nucleus c) magnets d) graphs 2) _____ and _____ are found inside the nucleus of an atom. a) protons, neutrons b) protons, electrons c) neutrons, electrons d) positive, negative 3) Protons have a _____ charge. a) positive b) negative c) neutral d) zero 4) Neutrons have a _____ charge. a) positive b) negative c) neutral d) minue 5) _____ are located outside the nucleus of an atom. a) electrons b) protons c) neutrons d) elements 6) Electrons have a _____ charge. a) negative b) positive c) neutral d) zero 7) Electrons have almost _____ mass. a) no b) all c) different d) 100 8) Most of the mass of an atom is located in its _____. a) nucleus b) shell c) electron d) neutron 9) When placing electrons around the nucleus, you move from the _____ shell out. a) inside b) outside c) last d) second 10) The inside shell, the first shell, is closest to the nucleus and can only hold _____ electrons. a) two b) four c) six d) eight 11) When the first shell is full, electrons begin to fill the second level which can hole up to _____ electrons. a) two b) four c) six d) eight 12) _____ are pure substances made up of only one type of atom. a) elements b) compounds c) molecules d) diatoms 13) Elements can be identified because they all have a unique and consistent number of _____. a) protons b) neutrons c) electrons d) compounds 14) The number of neutrons and _____ in the atom of an element can vary. a) electrons b) protons c) positive charges d) compounds 15) The _____ found on the periodic table indicates the number of protons in an element's atom. a) atomic number b) atomic mass c) mass number d) chemical symbol 16) The number of neutrons can be found using the _____ listed on the periodic table. a) atomic mass b) atomic number c) chemical symbol d) periods 17) If the atom has a neutral charge, the number of _____ is equal to the number of protons. a) electrons b) neutrons c) protons d) elements 18) The _____ is determined by adding the number of protons and the number of neutrons. a) atomic mass b) atomic number c) chemical symbol d) subscript 19) In order to find the number of neutrons in an atom, _____ the number of protons from the atomic mass. a) subtract b) add c) multiply d) divide 20) When an atom has more or less electrons than it does protons, the atom is _____. a) charged b) special c) a molecule d) negative 21) Atoms with opposite charges _____ one another. a) attract b) repel c) push away d) weaken 22) Atoms with the same charge _____ one another a) attract b) repel c) pull d) weaken 23) _____ or more atoms bonded together are called a molecule. a) two b) four c) six d) eight 24) Elemental molecules are when two or more atoms of the _____ element are bonded. a) same b) different c) compound d) atomic 25) Compound molecules are when two or more atoms of _____ elements are bonded. a) same b) different c) compound d) atomic

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