1) The atomic theory states that matter is made up of tiny particles. One of these particles is called an _______. a) element b) compound c) molecule d) proton e) atom f) nucleus 2) At the center of an atom is a tiny ________________. a) proton b) electron c) nucleus d) element e) compound f) neutron 3) A positively charged subatomic particle, and a(n) ________________, a subatomic particle with no charge are in the nucleus.  a) nucleus b) proton c) neutron d) electron e) element f) molecule 4) A(n)_________ is a subatomic particle with a negative charge. It is found inside the nucleus. a) nucleus b) proton c) neutron d) electron e) element f) compound 5) If an atom has a different number of protons from another atom, it is an atom of a different ________. a) nucleus b) proton c) electron d) element e) periodic table f) compound 6) The elements are arranged in the ___________ by atomic number a) electron b) element c) molecule d) periodic table e) compound f) atom 7) In nature, most elements are joined together in a(n)________________. a) element b) neutron c) electron d) atom e) periodic table f) compound 8) Two or more atoms joined together form a(n)_______________. a) atom b) neutron c) molecule d) compound e) periodic table f) nucleus

Elements and Compounds

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