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38 terms

chemistry

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one-half the distance between the nuclei
when determining the size of any atom by measuring the distance between identical adjacent nuclei, the radius of an atom is
either released or absorbed.
when an electron is added to a neutral atom, a certain amount of energy is
distance between nuclei or adjacent atoms
atomic size is determined by measuring the
ionization energy
the energy required to remove an electron from an atom is the atom's
electronegativity
a measure of the ability of an atom in a chemical compound to attract electrons is called
fluorine
the element that has the greatest electronegativity is
atomic radius
one-half the distance between the nuclei of identical atoms that are bonded together is called the
an electron
ionization energy is the energy required to remove ______ from an atom of an element
electron affinity
when an electron is acquired by a neutral atom, the energy change is called
cation
a positive ion is known as a
anion
a negative ion is known as an
decreases
in a row in the periodic table, as the atomic number increases, the atomic radius generally
increases
within a group of elements, as the atomic number increases, the atomic radius
have the highest ionization energies
in the alkaline-earth group, atoms with the smallest radii
gradually decrease
as the atomic number of the metals of group 1 increase, atomic radii
gradually decrease
across a period in the periodic table, atomic radii
the number of energy levels increase
which is the best reason that the atomic radius generally increases with atomic number in each group of elements?
the number of energy levels increases
which is the best reason that the atomic radius generally increases with atomic number in each group of elements?
the noble gas configuration has be reached
the ionization energies for removing successive electrons from sodium are 496 kJ/mol, 4562 kJ/mol, 6912 kJ/mol and 9544 kJ/mol. the great jump in ionization energy after the first electron is removed indicates that
increases
for each successive electron removed from an atom, the ionization energy
generally increases
as you move down the periodic table from carbon through lead, atomic radii
generally decrease
as you move left to right from gallium through bromine, atomic radii
generally increases
the energy required to remove from an electron for an atom ______ as you move left to right from potassium through iron
weak
the force of attraction by group 1 metals for their valence electrons is
valence electrons
the electrons available to be lost, gained, or shared when atoms form molecules are called
lost, gained, or shared
when chemical compounds form, valence electrons are those that may be
in the highest energy level
valence electrons are those
s
in group 2 elements, the valence electrons are in sublevel
7
the number of valence electrons in group 17 elements is
minus 10
for groups 13 through 18, the number of valence electrons is equal to the group number
2
the number of valence electrons in group 2 elements is
s and p
in groups 13 through 18, valence electrons may be in sublevels
decrease
across a period, the atomic radii of d-block elements generally
increase
as with main-group elements, ionization energies of d-block elements generally ______ across a period
increase
in contrast to elements in the main group, the first ionization energies of d-block elements _____ as one proceeds down each group
s electrons
the first electrons to be removed when d-blocks elements form ions are the
groups 1 and 2
which groups in the main group have lower electronegativity than d-block elements?
increase
among the d-block elements, as atomic radii decrease, electronegativity values