WGU D425 Introduction to Chemistry | High-Yield
Questions & Answers & Study Guide |Frequently
Most Tested Questions | 100% Guarantee Pass
and Well Accurate | Verified and Updated |
Latest Exam and Brand New Version!!!!
How is matter classified?
ANSWER:
pure substances and mixtures
Avogadro's number
ANSWER:
number of representative particles in a mole, 6.02 X 10^23
Words like atom, particles, molecules, formula units mean?
ANSWER:
use Avogadro's number 6.02x10^23
Imperial System
ANSWER:
the system of measurement used in the United States
What is an element?
ANSWER:
A substance that cannot be broken down into simpler substances
What is a molecule ?
ANSWER:
,a group of two or more atoms held together by chemical bonds
Is matter affected by physical changes?
ANSWER:
physical changes DO NOT alter the composition of matter
Is matter affected by chemical changes ?
ANSWER:
Chemical changes transform matter in such a way that the identity or
chemical substance changes
What is the law of conservation of mass?
ANSWER:
matter can neither be created nor destroyed
What is an compound?
ANSWER:
pure substance that contains more than one element and can be
broken down into chemically simpler components
What is a mixture?
ANSWER:
is a physical blend of two or more pure substances where each
retains its own identity and properties in the mixture
What are the three phases of matter?
ANSWER:
solid, liquid, gas
What is matter composed of?
ANSWER:
atoms
,How is energy transferred?
ANSWER:
heat and work
What is the motion of energy?
ANSWER:
kinetic energy
what is resting energy?
ANSWER:
potential energy
bonding electron pair
ANSWER:
two electrons shared between atoms
What are core electrons?
ANSWER:
inner electrons core shell
What are colvalent bonds?
ANSWER:
bond formed by the sharing of electrons between nonmetals
example: H2O, NH3
valance electrons
ANSWER:
electrons in the outermost shell
noble gases
ANSWER:
, the elements in Group 8A of the periodic table
octet rule
ANSWER:
an atom will be more stable when surrounded by eight electrons in
the valence shell
What is a ion?
ANSWER:
an atom or molecule with a net electric charge due to the loss or gain
of one or more electrons.
You should know the base unit measurement
ANSWER:
Length
Mass
Temperature
Time
Amount of a substance
Electric current
Luminous intensity
What are ionic bonds?
ANSWER:
bonds that occur between a metal and non metal
What are cations?
ANSWER:
positively charged ions
What are anions?
ANSWER:
Questions & Answers & Study Guide |Frequently
Most Tested Questions | 100% Guarantee Pass
and Well Accurate | Verified and Updated |
Latest Exam and Brand New Version!!!!
How is matter classified?
ANSWER:
pure substances and mixtures
Avogadro's number
ANSWER:
number of representative particles in a mole, 6.02 X 10^23
Words like atom, particles, molecules, formula units mean?
ANSWER:
use Avogadro's number 6.02x10^23
Imperial System
ANSWER:
the system of measurement used in the United States
What is an element?
ANSWER:
A substance that cannot be broken down into simpler substances
What is a molecule ?
ANSWER:
,a group of two or more atoms held together by chemical bonds
Is matter affected by physical changes?
ANSWER:
physical changes DO NOT alter the composition of matter
Is matter affected by chemical changes ?
ANSWER:
Chemical changes transform matter in such a way that the identity or
chemical substance changes
What is the law of conservation of mass?
ANSWER:
matter can neither be created nor destroyed
What is an compound?
ANSWER:
pure substance that contains more than one element and can be
broken down into chemically simpler components
What is a mixture?
ANSWER:
is a physical blend of two or more pure substances where each
retains its own identity and properties in the mixture
What are the three phases of matter?
ANSWER:
solid, liquid, gas
What is matter composed of?
ANSWER:
atoms
,How is energy transferred?
ANSWER:
heat and work
What is the motion of energy?
ANSWER:
kinetic energy
what is resting energy?
ANSWER:
potential energy
bonding electron pair
ANSWER:
two electrons shared between atoms
What are core electrons?
ANSWER:
inner electrons core shell
What are colvalent bonds?
ANSWER:
bond formed by the sharing of electrons between nonmetals
example: H2O, NH3
valance electrons
ANSWER:
electrons in the outermost shell
noble gases
ANSWER:
, the elements in Group 8A of the periodic table
octet rule
ANSWER:
an atom will be more stable when surrounded by eight electrons in
the valence shell
What is a ion?
ANSWER:
an atom or molecule with a net electric charge due to the loss or gain
of one or more electrons.
You should know the base unit measurement
ANSWER:
Length
Mass
Temperature
Time
Amount of a substance
Electric current
Luminous intensity
What are ionic bonds?
ANSWER:
bonds that occur between a metal and non metal
What are cations?
ANSWER:
positively charged ions
What are anions?
ANSWER:
