chemistry exam study guide with
Answers
properties of metals - correct answer-shiny, malleable, ductile
properties of non metals - correct answer-not shiny, malleable ductile
chemical changes - correct answer-the change in an elements actual chemical makeup
physical changes - correct answer-a change is the physical condition of an element
define matter - correct answer-anything that takes up space
what do intensive changes need or not need - correct answer-this does not depend on
the amount of matter there
extensive changes - correct answer-these depend on the amount of matter there
how are particles arranged in solids, liquids, and gases - correct answer-solid particles
are arranged definitely so they arent moving
liquids particles are moving every which way
gases have no shape at all
what are the 2 types of mixtures - correct answer-pure and regular
pure- have to be separated chemically
regular - have to be separated physically
what are the differences between compunds and elements - correct answer-elements
are just single elements while compounds are mixtures of different elements
homogenous vs. heterogeneous mixtures - correct answer-homo - this is a mixture of all
the same things throughout
het - this is a mixture of all different things throughout
pure substance and compound - correct answer-pure - this is an element of all one
atom
compound - this is a mix of different atoms and elements
phase change
chemical or physical change? - correct answer-this is a change from a solid to a liquid
or from a liquid to a gas and it is always physical
, heat flow and temp. problems - correct answer-...
atomic number - correct answer-number of protons
atomic mass - correct answer-number of protons and neutrons
what is an isotope - correct answer-this is a specific form of an element
list the 3 types of isotopes of hydrogen - correct answer-1. protium 1, 0, 1
2, dueterium 1, 1, 1
3. tritium 1, 2, 1
what determines the identity of an atom - correct answer-the number of protons
what determine the volume of an atom - correct answer-electron cloud
define atom - correct answer-this is the smallest unit possible of an element
compare protons neutrons and electrons - correct answer-protons are positive and are
in the nucleus
neutrons have no charge and are in the nucleus
electrons are negative and ae outside the nucleus
give examples of phase changes that are endo and exo - correct answer-endo - solid to
gas
exo - gas to liquid or gas to solid
what are examples of exothermic chemical changes - correct answer-?
what are 3 extensive properties - correct answer-mass, volume, length and amount
what is a period - correct answer-this is the left to right rows in the table
what is a family - correct answer-these are the up and down columns in a table
what is a hypothesis - correct answer-this is a testable statement that one makes
what are independent variables - correct answer-this is the change in x on a graph
what are dependent changes - correct answer-this is the y on a graph that only changes
when x changes
what is a theory - correct answer-this is a general statement that one makes that is very
broad
Answers
properties of metals - correct answer-shiny, malleable, ductile
properties of non metals - correct answer-not shiny, malleable ductile
chemical changes - correct answer-the change in an elements actual chemical makeup
physical changes - correct answer-a change is the physical condition of an element
define matter - correct answer-anything that takes up space
what do intensive changes need or not need - correct answer-this does not depend on
the amount of matter there
extensive changes - correct answer-these depend on the amount of matter there
how are particles arranged in solids, liquids, and gases - correct answer-solid particles
are arranged definitely so they arent moving
liquids particles are moving every which way
gases have no shape at all
what are the 2 types of mixtures - correct answer-pure and regular
pure- have to be separated chemically
regular - have to be separated physically
what are the differences between compunds and elements - correct answer-elements
are just single elements while compounds are mixtures of different elements
homogenous vs. heterogeneous mixtures - correct answer-homo - this is a mixture of all
the same things throughout
het - this is a mixture of all different things throughout
pure substance and compound - correct answer-pure - this is an element of all one
atom
compound - this is a mix of different atoms and elements
phase change
chemical or physical change? - correct answer-this is a change from a solid to a liquid
or from a liquid to a gas and it is always physical
, heat flow and temp. problems - correct answer-...
atomic number - correct answer-number of protons
atomic mass - correct answer-number of protons and neutrons
what is an isotope - correct answer-this is a specific form of an element
list the 3 types of isotopes of hydrogen - correct answer-1. protium 1, 0, 1
2, dueterium 1, 1, 1
3. tritium 1, 2, 1
what determines the identity of an atom - correct answer-the number of protons
what determine the volume of an atom - correct answer-electron cloud
define atom - correct answer-this is the smallest unit possible of an element
compare protons neutrons and electrons - correct answer-protons are positive and are
in the nucleus
neutrons have no charge and are in the nucleus
electrons are negative and ae outside the nucleus
give examples of phase changes that are endo and exo - correct answer-endo - solid to
gas
exo - gas to liquid or gas to solid
what are examples of exothermic chemical changes - correct answer-?
what are 3 extensive properties - correct answer-mass, volume, length and amount
what is a period - correct answer-this is the left to right rows in the table
what is a family - correct answer-these are the up and down columns in a table
what is a hypothesis - correct answer-this is a testable statement that one makes
what are independent variables - correct answer-this is the change in x on a graph
what are dependent changes - correct answer-this is the y on a graph that only changes
when x changes
what is a theory - correct answer-this is a general statement that one makes that is very
broad
