Introductory Chemistry Study Set 7

Chemistry

Quiz 3 :

Atoms, Molecules, and Ions

Quiz 3 :

Atoms, Molecules, and Ions

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According to chemical nomenclature, SO2 is referred to as sulfur dioxide.
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True

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I is an example of a monatomic anion.
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True

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Atoms of the same element with different numbers of electrons are called isotopes.
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False

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'Au' is the atomic symbol of the element silver.
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The proton is a heavier subatomic particle than the electron and has a positive charge.
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The molecule Se2Br2 is called diselenide dibromide.
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Monatomic ions are formed when an atom loses or gains one or more electrons to attain a charge.
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The connection between two atoms in a molecule is called a chemical bond.
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According to the nomenclature of ionic compounds, MgCl2 is called magnesium dichloride.
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Hydrogen and oxygen exist naturally as three-atom molecules.
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N3− is called trinitride ion.
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The atomic mass unit is defined as one-twelfth of the mass of a nitrogen-14 atom.
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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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Species with overall negative charges are termed anions.
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Uranium-235 isotope of uranium has 143 neutrons.
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In the ionic compound NaCl, sodium ion is the cation and chloride ion is the anion.
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A proper covalent formula has a cation and an anion in it.
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The atomic mass of an element is a weighted average of the masses of the isobars of an atom.
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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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The smallest piece of an element that maintains the identity of that element is called a molecule.
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