SEMMELWEIS PRACTICE QUESTIONS
AND ANSWERS
The mole concept - CORRECT ANSWER-A method that allows
the relative number of reactant particles involved in a chemical
reaction to be known
Avogadro's number - CORRECT ANSWER-number of
representative particles in a mole, 6.02 X 10^23
Basic st...
The mole concept - CORRECT ANSWER-A method that allows
the relative number of reactant particles involved in a chemical
reaction to be known
Avogadro's number - CORRECT ANSWER-number of
representative particles in a mole, 6.02 X 10^23
Basic structures of atoms - CORRECT ANSWER-There is a
nucleus in the center surrounded by an electron cloud or field
Quantum numbers - CORRECT ANSWER-Quantum numbers
describe values of conserved quantities in the dynamics of a
quantum system. In the case of electrons, the quantum
numbers can be defined as "the sets of numerical values which
give acceptable solutions to the Schrödinger wave equation for
the hydrogen atom"
Common compounds - CORRECT ANSWER-Water (H2O),
table salt (NaCL); carbon dioxide (CO2); baking soda
(NaHCO3); carbon monoxide (CO); sand or glass (SiO2)
, Periodic properties - CORRECT ANSWER-chemical or physical
properties that vary among elements according to trends that
repeat as atomic number increases
What are the periodic properties? - CORRECT ANSWER-
Element (on periodic table) - CORRECT ANSWER-
Atomic number is the same as - CORRECT ANSWER-number
of protons
Atomic mass is the same as - CORRECT ANSWER-Number of
protons and neutrons
Different types of chemical bonding - CORRECT ANSWER-
metallic, covalent, ionic
What is covalent bonding and how does it work? - CORRECT
ANSWER-when atoms share one or more pairs of electrons.
They have similar electronegativities
What is ionic bonding? - CORRECT ANSWER-when atoms
transfer electrons. Large difference in electronegativity
Examples of ionic bonds - CORRECT ANSWER-NaCl
Cs2O
MgO
NH4NO3
What is metallic bonding? - CORRECT ANSWER-the chemical
bonding that results from the attraction between metal atoms
and the surrounding sea of electrons
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