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unit-1-review-answers

unit-1-review-answers - 1 Probably not its water(H2O 2...

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1. Probably not, it’s water (H 2 O) 2. SATP (standard ambient temperature & pressure: 25 ° C, 100 kPa), STP ° C, 101.325 kPa) Element : cannot be broken down by chemical means (all same type of atom). Compound : broken down by chemical means (two or more different types of atoms) Group : vertical column on periodic table Period : horizontal (Ieft/right) row Metal : element to the left of the staircase line. They tend to be solids at SATP, and conduct. Nonmetals : to the right of staricase line. Tend to be gases, non-conductors, and brittle as solid
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VII - halogens, VIII - noble gasses, middle - transition elements/metals, bottom - inner transition elements (lanthanides, actinides) 4. Democritus : first to propose atom and the void based purely on logic Aristotle : his ideas were also based on thought. He was way off, but his ideas persisted for 2000 years Dalton : 1 st to investigate structure of matter by experiment. His five postulates included the
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unit-1-review-answers - 1 Probably not its water(H2O 2...

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