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who arranged the elements according to atomic mass and used the arrangement to predict the properties of the missing elements
to what category of elements does an element belong to if it is a poor conductor of electricity
in which of the following sets is the symbol of the element the number of protons and the # of electrons given correctly
In 49 protons 49 electrons b
which of the following is true about the electron config of the noblee gasses
the highest occupied s and p sublevels are completely filled
which of the following electron configurations is most likely to result in an element that is relatively inactive
a filled highest occupied pricipal energy level
which of the following is true about the electron config. of the representative elements
the highest occupied s and p sublevels are partially filled
what causes the shielding effect to remain constant across a periodic table
electrons added to the same level cause it depends only on the electrons in lower shells
atomic size generally __as you move from left to right across a period and ___ from top to bottom with a group
which of the following factors contributes to the increase in atomic size within a group in the periodic table as the atomic number increases
more shielding of the electrons by the highest occupied energy level
which of the following statements is not true about ions
when cations form more electrons are transferred to it
why is the 2nd ionization energy greater that the first ionization energy?
it is more dificult to remove a second electron from an atom
what is the energy required to remove an electron from an atom in the gaseous state called
which of the following factors contributes to the decrease in ionization energy within a group in the periodic table as the atomic # increases
increase in atomic size
which statement is true about electron negativity
generally increases from left to right across the period
compared with the electronnegativities of the elements on the left side of a period the electronegativities of the elements on the right side of the same periodic table tend to be
which of the following statements correctly compares the relative size of an ion to its neutral atom
the radius of an anion is greater than the radius of its neutral atom
which of the following factors contributes to the increase in ionization energy from left to right across a period
an increase in the # of proton
as you move from left to right across the 2nd period of the periodic table
ionization energy increases
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