CHEMISTRY SEMESTER 1 FINAL
REVIEW GUIDE QUESTIONS & VERIFIED
RATIONALIZED ANSWERS 100%
GUARANTEED PASS
Define Chemistry:
Define Matter: - Chemistry is the study of matter and the changes it undergoes.
Matter is the "stuff" of which the universe is composed; it as mass and it occupies space.
Distinguish physical from chemical properties; physical and chemical changes. - Physical Properties:
substance shows by itself, without interacting with another substance.
Chemical Properties: Properties a substance shows on interaction with other substances.
Physical Change: Change that only affects physical properties. Leads to a different form of the same
substance.
Chemical Change: Substance (s) are changed into NEW substances.
Physical or Chemical change?
Pounding Al into sheets...
Melting Butter....
A car rusting...
Mg Burning...
Koolaid dissolving.... - Physical
Physical
Chemical
Chemical
Physical
Compare exothermic and endothermic reactions:
, wood burning...
ice melting.... - exo
endo
What is exothermic? - energy (heat) flows out of the system into the surroundings.
What is endothermic? - energy (heat) flows from the surroundings into the system.
Distinguish between atoms, elements, molecules. - atoms: the smallest particle still characterizing a
chemical element
elements: substance containing ONE type of atom and is defined by its ATOMIC NUMBER (# of protons in
nucleus). can be bonded or "unbonded"
molecules: at least two atoms (same or different) held together by bonds behaving as a unit.
Define/ give examples of allotropes - An alletrope is a different molecular or crystalline form of a
element.
O₂/O₃, S/S₈,
3 allotropes of carbon = diamond, graphite, buckminsterfullerene.
What is a pure substance? - either a pure elect or a compound.
What is a homogeneous mixture? - a mixture that is the same throughout. dissolves into something.
What is a heterogenous mixture? - a mixture containing regions with different properties. example: sand
and water.
What is a element? - Substance containing only one type of atom.
What is a compound? - Substance made by bonding atoms together in specific ways. Two or more
different types of atoms.
REVIEW GUIDE QUESTIONS & VERIFIED
RATIONALIZED ANSWERS 100%
GUARANTEED PASS
Define Chemistry:
Define Matter: - Chemistry is the study of matter and the changes it undergoes.
Matter is the "stuff" of which the universe is composed; it as mass and it occupies space.
Distinguish physical from chemical properties; physical and chemical changes. - Physical Properties:
substance shows by itself, without interacting with another substance.
Chemical Properties: Properties a substance shows on interaction with other substances.
Physical Change: Change that only affects physical properties. Leads to a different form of the same
substance.
Chemical Change: Substance (s) are changed into NEW substances.
Physical or Chemical change?
Pounding Al into sheets...
Melting Butter....
A car rusting...
Mg Burning...
Koolaid dissolving.... - Physical
Physical
Chemical
Chemical
Physical
Compare exothermic and endothermic reactions:
, wood burning...
ice melting.... - exo
endo
What is exothermic? - energy (heat) flows out of the system into the surroundings.
What is endothermic? - energy (heat) flows from the surroundings into the system.
Distinguish between atoms, elements, molecules. - atoms: the smallest particle still characterizing a
chemical element
elements: substance containing ONE type of atom and is defined by its ATOMIC NUMBER (# of protons in
nucleus). can be bonded or "unbonded"
molecules: at least two atoms (same or different) held together by bonds behaving as a unit.
Define/ give examples of allotropes - An alletrope is a different molecular or crystalline form of a
element.
O₂/O₃, S/S₈,
3 allotropes of carbon = diamond, graphite, buckminsterfullerene.
What is a pure substance? - either a pure elect or a compound.
What is a homogeneous mixture? - a mixture that is the same throughout. dissolves into something.
What is a heterogenous mixture? - a mixture containing regions with different properties. example: sand
and water.
What is a element? - Substance containing only one type of atom.
What is a compound? - Substance made by bonding atoms together in specific ways. Two or more
different types of atoms.
