Elements, Etc 2: Question Preview (ID: 12247)

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Elements in the same group (column)
a) are metals b) react in similar ways c) have the same atomic mass d) are noble gases
Water is not found on the periodic table because water is
a) an atom b) a liquid c) a mixture d) a compound
Which substance is a compound?
a) CO b) He c) Si d) Fe
Which substances are elements?
a) H2CO3 and HCl b) CO2 and H2O c) O and He d) H2O and O
All matter is made up of
a) cells b) atoms c) molecules d) compounds
Which is only a physical change?
a) the souring of milk b) the burning of oil c) the melting of ice d) the rusting of iron
All the atoms that make up an element are
a) alike but different from those of other elements b) always spaced the same distance aprart on the periodic table c) different but have the same mass as the atoms of other elements d) always moving at the same speed
How many atoms of hydrogen are in two water molcules (remember water is H20)
a) 1 b) 2 c) 3 d) 4
What is a sign of a chemical reaction occuring?
a) bubbling and fizzing b) nothing c) color change d) smaller
What speeds up a chemical reaction?
a) sugar b) Increase the temperature c) yelling at it d) Decrease the temperature
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