Exam (elaborations)
CHEM 101-Straighterline Exam 1-Answered
CHEM 101-Straighterline Exam 1-Answered
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CHEM 101-Straighterline Exam 1-Answered77 K is colder than 4 K. - ANSWER-false
A bond between two or more atoms in which the electrons are shared. - ANSWER-
covalent bond
A bond between two or more atoms in which the electrons reside primarily in one atom.
- ANSWER-ionic bond
A bond between two or more metals in which the electrons do not belong to a particular
metal atom. - ANSWER-metallic bond
A column in the periodic table. Elements in the same column will have similar chemical
properties. - ANSWER-group
A combination of SI units. - ANSWER-derived units
A compound that dissociates completely into ions in an aqueous solution. - ANSWER-
strong electrolyte
A compound that only dissociates to a small extent in an aqueous solution, producing
very few ions. - ANSWER-weak electrolyte
A derived unit defined as mass/volume. - ANSWER-density
A measurement that is repeatable in an experimental setup, within an acceptable range
of error. - ANSWER-reliable measurements
A metric temperature unit system used throughout the world. - ANSWER-celsius
A negatively charged ion. - ANSWER-anion
A negatively charged particle that moves around the nucleus. - ANSWER-electron
A non-place-holding digit in any numerical measurement. - ANSWER-significant digit
A particle in the nucleus that has a positive charge. - ANSWER-proton
A physical combination of substances in which each substance keeps its own physical
and chemical properties. - ANSWER-mixture
A physical combination of substances of non-uniform composition. - ANSWER-
heterogeneous mixture
, A physical combination of substances of uniform composition. - ANSWER-
homogeneous mixture
A positively charged ion. - ANSWER-cation
A property that depends on the amount of a substance. - ANSWER-extensive property
A property that does not depend on the amount of a substance. - ANSWER-intensive
property
A pure substance made up of two or more elements. - ANSWER-compound
A pure substance that cannot be broken into component parts. Examples include
helium, nitrogen, and oxygen. - ANSWER-element
A quantitative observation. - ANSWER-measurement
A row in the periodic table. - ANSWER-period
A solid that has atoms and molecules in a repeatable pattern. - ANSWER-crystalline
solid
A solid that when dissolved in a solvent produces a solution that does not conduct
electricity. - ANSWER-nonelectrolyte
A solid whose atoms or molecules are not arranged in a specific pattern. - ANSWER-
amorphous solid
A solution in which the solvent is water. - ANSWER-aqueous solution
A subatomic particle in the nucleus that has no charge. - ANSWER-neutron
A substance does not vary its composition within the substance nor between samples of
the same substance. - ANSWER-pure substance
A substance in which the atoms or molecules are fixed at a specific position. It exhibits
a fixed volume and rigid shape. - ANSWER-solid
A substance in which the atoms or molecules are free to move relative to one another. It
always assumes the shape and volume of its container. - ANSWER-gas
A substance in which the atoms or molecules pack closer than a gas, but are still able to
freely move relative to one another. It exhibits a fixed volume, but not a fixed shape. -
ANSWER-liquid
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