SCS - ch 11
What is an element? - ANS-A substance that always will gain weight (mass) when undergoing
chemical change
Atomic Number - ANS-Unique integer displayed above symbol on periodic table
Average Atomic Weight - ANS-Decimal number below the symbol; average mass of an atom of
the element in units (amu)
Mixtures are able to be separated by some means into _________ substances. - ANS-pure
Heterogeneous Mixture - ANS-pieces of mixture can be seen (concrete, wood, soil, veggie
soup)
Homogeneous Mixture - ANS-mixture cannot be seen, mixed at molecular level (air, saltwater,
stainless steel)
H - ANS-hydrogen
He - ANS-helium
Li - ANS-lithium
Be - ANS-beryllium
B - ANS-boron
C - ANS-carbon
N - ANS-nitrogen
O - ANS-oxygen
F - ANS-fluorine
Ne - ANS-neon
Na - ANS-sodium
Mg - ANS-magnesium
What is an element? - ANS-A substance that always will gain weight (mass) when undergoing
chemical change
Atomic Number - ANS-Unique integer displayed above symbol on periodic table
Average Atomic Weight - ANS-Decimal number below the symbol; average mass of an atom of
the element in units (amu)
Mixtures are able to be separated by some means into _________ substances. - ANS-pure
Heterogeneous Mixture - ANS-pieces of mixture can be seen (concrete, wood, soil, veggie
soup)
Homogeneous Mixture - ANS-mixture cannot be seen, mixed at molecular level (air, saltwater,
stainless steel)
H - ANS-hydrogen
He - ANS-helium
Li - ANS-lithium
Be - ANS-beryllium
B - ANS-boron
C - ANS-carbon
N - ANS-nitrogen
O - ANS-oxygen
F - ANS-fluorine
Ne - ANS-neon
Na - ANS-sodium
Mg - ANS-magnesium
