ch 9 learning curve

First ionization energy _____ left to right across a period and _____ down a group.
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Terms in this set (13)
First ionization energy _____ left to right across a period and _____ down a group.
increases, decreases
Select the choice with the elements correctly ranked from largest to smallest first ionization energy.
Se, As, Ca, K
First ionization energy increases from left to right across a period, so Se has the largest and K has the smallest first ionization energy.
Given the following elements, identify the element with the largest second ionization energy.
Ar
Second ionization energy increases left to right across a period. Argon has the largest second ionization energy.
Identify the choice with the elements ranked from largest to smallest atomic radius.
Na, Si, O, He
Atomic radius increases down a group and right to left across a period. Sodium is the largest and helium is the smallest.
Select the answer with the elements ranked from largest to smallest atomic radius.
Xe, Kr, Ar, Ne
Atomic radius increases down a group, so xenon would have the largest atomic radius and neon would have the smallest.
The ionic radius of a cation, compared to the corresponding parent atom, is _____.
smaller
Cations are much smaller than their corresponding parent atom because they have lost their outermost electrons.
The ionic radius of an anion, compared to the corresponding parent atom, is _____.
larger
Anions are much larger than their corresponding parent atom because they have extra electrons.
Select the elements that are ranked correctly from largest to smallest first ionization energy.
F, Cl, Br, I
First ionization energy decreases down a group, so F has the largest and I has the smallest first ionization energy.
Select the choice with the elements ranked correctly from largest to smallest first ionization energy.
F, S, Mg, Ca
First ionization energy increases from left to right across a period and up a group. Fluorine has the largest first ionization energy and calcium has the smallest.
Select the answer choice, composed of both ions and atoms, ranked correctly from smallest to largest size according to ionic and atomic radius.
F, F−, Ca2+, Ca
Atomic radius increases down a group and from right to left across a period. Cations are smaller than the parent atom and anions are larger than the parent atom. Based on atomic radius, Ca is larger than F and based on ionic radius, F− is larger than F and Ca>2+ is smaller than Ca.