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Chemistry
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Introductory Chemistry Study Set 7
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Introductory Chemistry Study Set 7
Chemistry
Quiz 3 :
Atoms, Molecules, and Ions
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Quiz 3 :
Atoms, Molecules, and Ions
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According to chemical nomenclature, SO
2
is referred to as sulfur dioxide.
Free
True False
Q01
Answer:
Answer:
True
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I
−
is an example of a monatomic anion.
Free
True False
Q02
Answer:
Answer:
True
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Atoms of the same element with different numbers of electrons are called isotopes.
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True False
Q03
Answer:
Answer:
False
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'Au' is the atomic symbol of the element silver.
True False
Q04
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The proton is a heavier subatomic particle than the electron and has a positive charge.
True False
Q05
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The molecule Se
2
Br
2
is
called diselenide dibromide.
True False
Q06
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Monatomic ions are formed when an atom loses or gains one or more electrons to attain a charge.
True False
Q07
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The connection between two atoms in a molecule is called a chemical bond.
True False
Q08
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According to the nomenclature of ionic compounds, MgCl
2
is called magnesium dichloride.
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Q09
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Hydrogen and oxygen exist naturally as three-atom molecules.
True False
Q10
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N
3−
is called trinitride ion.
True False
Q11
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The atomic mass unit is defined as one-twelfth of the mass of a nitrogen-14 atom.
True False
Q12
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The molecular mass of dinitrogen trioxide is determined by adding the atomic mass of nitrogen two times with the atomic mass of oxygen three times.
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Q13
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Species with overall negative charges are termed anions.
True False
Q14
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Uranium-235 isotope of uranium has 143 neutrons.
True False
Q15
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In the ionic compound NaCl, sodium ion is the cation and chloride ion is the anion.
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Q16
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A proper covalent formula has a cation and an anion in it.
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Q17
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The atomic mass of an element is a weighted average of the masses of the isobars of an atom.
True False
Q18
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The number of protons and electrons in an element's nucleus is called the atomic number of the element.
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Q19
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The smallest piece of an element that maintains the identity of that element is called a molecule.
True False
Q20
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