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 The answers should be entered below this study guide. media type="custom" key="2907497" Highlighted answers are correct....please don't highlight your own answers. 1. Rule of nature 2. Theory 3. It is discarded or changed 4.To avoid injury and to get the best results possible 5.chemistry and physics 6.Independent Variable 7. hypothesis 8.observation 9.Dependent variable 10. Scientific law 11.Physical science 13.A change that affects only the physical properties of a substance 14.A change in a substance that involves breaking and reforming of chemical bonds to make one or more different substances 15. Solid: definite volume and shape liquid: definite volume and no definite shape gas: no definite volume or shape plasma: super heated charged particles;most common state of matter in the universe 16.<span style="background-color: rgb(49, 255, 0);">mass 17.volume 18.density 19.atom 20. <span style="background-color: rgb(97, 230, 65);">chemical bond<span style="background-color: rgb(97, 230, 65);"> 21. <span style="background-color: rgb(68, 255, 0);">compound 22.element 23.symbol 24. <span style="background-color: rgb(121, 245, 81);">formula 25.<span style="background-color: rgb(112, 236, 65);">mixture 26.<span style="background-color: rgb(139, 248, 63);">heterogeneous 27.question is messed up BLANK SHOULD BE HOMOGENEOUS 28.electron (negative charge outside of nucleus) proton (positive charge inside of nucleus) neutron (no charge inside of nucleus) 29.<span style="background-color: rgb(69, 254, 47);">atomic number 30.<span style="background-color: rgb(80, 245, 36);"> because the protons and electrons in a atom are equal 31.<span style="background-color: rgb(129, 255, 87);">nucleus 32.valence electrons 33.electron 34. <span style="background-color: rgb(135, 240, 10);">B 35.<span style="background-color: rgb(116, 252, 44);">Valence electrons can be lost, shared, or gained. 36.<span style="background-color: rgb(70, 255, 0);"> Decomposition 37.<span style="background-color: rgb(136, 252, 69);"><span style="background-color: rgb(255, 255, 255);"><span style="background-color: rgb(130, 250, 30);">reactants 38. OMIT 39.products 40.<span style="background-color: rgb(103, 248, 58);">chemical equation 41.coefficient 42.<span style="background-color: rgb(55, 237, 38);">subscripts 43. <span style="background-color: rgb(30, 250, 5);">number of each atom or mass 44.<span style="background-color: rgb(158, 252, 105);">endothermic reaction 45.reactants 46.exothermic reaction 47.<span style="background-color: rgb(128, 242, 90);">liquid 48. <span style="background-color: rgb(103, 245, 56);">far right corner 49.<span style="background-color: rgb(111, 253, 93);">Group one 50.number of valence electrons 51.35 protons and electrons 52.<span style="background-color: rgb(108, 254, 88);">solid 53.compound 54.period

1.
 * <span style="background-color: rgb(37, 255, 0);">Sodium oxide
 * <span style="background-color: rgb(37, 255, 0);">Lead (II) oxide
 * <span style="background-color: rgb(37, 255, 0);">magnesium hydroxide
 * <span style="background-color: rgb(37, 255, 0);">dihydrogen monosulfide
 * <span style="background-color: rgb(37, 255, 0);">copper (II) chloride
 * <span style="background-color: rgb(37, 255, 0);">calcium oxide

2. LiF 3.