Select the term that describes the smallest particle of acompound that can exist

Question

Select the term that describes the smallest particle of acompound that can exist and still retain the characteristicchemical properties of a substance.
       molecule
       atom
       electron
       nucleus


The atomic number of an atom identifies the number of

       neutrons.
       protons.
       quantum orbits.
       excitedstates.


Isotopes are atoms of an element with identical chemicalproperties but with different
       numbers ofprotons.
       numbers ofelectrons.
       atomic numbers.
       masses.


The weighted average of the masses of the stable isotopes ofan element as they occur in nature is called the
       atomic number.
       atomic mass.
       atomic weight.
       mass number.


Which of the following terms best describes a well mixed cup ofcoffee with sugar?
       pure substance
       heterogeneousmixture
       homogeneousmixture
       compound

Select the term that describes the smallest particle of acompound that can exist and still retain the characteristicchemical properties of a substance.
       molecule
       atom
       electron
       nucleus


The atomic number of an atom identifies the number of

       neutrons.
       protons.
       quantum orbits.
       excitedstates.


Isotopes are atoms of an element with identical chemicalproperties but with different
       numbers ofprotons.
       numbers ofelectrons.
       atomic numbers.
       masses.


The weighted average of the masses of the stable isotopes ofan element as they occur in nature is called the
       atomic number.
       atomic mass.
       atomic weight.
       mass number.


Which of the following terms best describes a well mixed cup ofcoffee with sugar?
       pure substance
       heterogeneousmixture
       homogeneousmixture
       compound

Explanation / Answer

Select the term that describes the smallest particle of acompound that can exist and still retain the characteristicchemical properties of a substance.
Atom (this is part the definition of an atom)


The atomic number of an atom identifies the number of

Protons (this is the definition of an atomic number)


Isotopes are atoms of an element with identical chemicalproperties but with different

Masses (isotopes have the same number of protons,electrons, and atomic numbers, but a different number of neutrons,and therefore different masses)

The weighted average of the masses of the stable isotopes ofan element as they occur in nature is called the
Atomic Weight (this is the definition of atomic weight).


Which of the following terms best describes a well mixed cup ofcoffee with sugar?

Heterogeneous Mixture (It is not a pure substance, as itis a mixture. It is not a compound because the coffee andsugar don't bond. It is not heterogeneous because there willstill be higher concentrations of sugar toward the bottom.)

I hope I helped!

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