Explanation:

Ionization energy goes up across the duration and under as friend go down the group. This is the power required to remove an electron. The the listed elements it would certainly be hardest to remove an electron indigenous Flourine as the hopeful nucleus close come the electron orbitals has higher attractive force.

You are watching: Which of these elements has the smallest atomic radius


Explanation:

Helium has actually the smallest atomic radius. This is because of trends in the routine table, and also the effective nuclear fee that holds the valence electron close come the nucleus. Atom radius decreases as you move across a duration from left to right and decreases as you relocate up a group from bottom to top. Since He is in ~ the top right-hand edge of the table, it must have the the smallest atomic radius.


Explanation:

The routine table enables you come follow general guidelines or "trends" the are presented on the table. Atomic radius is one together trend. As you relocate down in groups, more shells are added to the atom which outcomes in an increase in radius. Together you relocate to the right on the regular table, the atom charge increases which pulls the elctrons closer to the nucleus. Together a result, the atom radius will decrease when moving to the right.


Explanation:

Atomic radius decreases together you move left to appropriate on the periodic table. Together atomic number increases, so does the variety of positive proton in the nucleus. To the much left that a period, electrons room widespread in ~ a new electronic shell. To the far right the the period, the electron still occupy the same shell, yet experience greater attractive force toward the nucleus as result of the higher number of proton present.

While that is true the flourine is the many electronegative element, this walk not influence atomic radius (though the two fads follow comparable patterns).


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Example concern #19 : routine Trends


The difference in the atom radii that fluorine and also lithium is most comparable to the difference in the atomic radii of i beg your pardon pair the elements?


Possible Answers:

As and also Se


Fe and Br


Cs and also Bi


Na and Cl


Be and B


Correct answer:

Na and also Cl


Explanation:

The atomic radius of elements decreases together one moves from left come right throughout the periodic table. The level to i beg your pardon lithium has actually a bigger atomic radius 보다 fluorine is most comparable to the difference between an additional pair of facets within the exact same groups, the are additionally found ~ above the left and also right political parties of the table.

Fluorine and chlorine are both halogens, and also lithium and sodium room both alkali metals. Fluorine and also lithium are both in the second period, and sodium and also chlorine space both in the third. Together you relocate from lithium to fluorine across the table, you will certainly see comparable changes and also patterns together if you were moving from salt to chlorine.


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Example inquiry #20 : routine Trends


Which the the complying with atoms has the biggest atomic radius?


Possible Answers:

Oxygen


Fluorine


Sulfur


Chlorine


Correct answer:

Sulfur


Explanation:

When predicting just how atomic radius will adjust as you relocate along the regular table, remember these two trends.

1. As you move down the table in a offered group, the atomic radius the the atoms will certainly increase.

2. As you move left to appropriate in a offered period, the atomic radius will certainly decrease.

Knowing this, we can compare the feasible options. Sulfur and chlorine are in the lowest period, for this reason they have the biggest atomic radii. Because sulfur is come the left the chlorine ~ above the periodic table, that will have actually a bigger atomic radius. As a result, sulfur has actually the largest atomic radius the end of the possible options.


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Example inquiry #21 : regular Trends


Which of the following atoms has the the smallest atomic radius?


Possible Answers:

Chlorine


Nitrogen


Oxygen


Sulfur


Fluorine


Correct answer:

Fluorine


Explanation:

As girlfriend move throughout a single period (row) on the regular table, the atom radius of each successive atom decreases. Together you move down a single group (column), the atom radius that each successive atom increases. Together you relocate down a group, the maximum power level of the valence shell increases, thus increasing the size of the electron cloud and atomic radius. Together you move across a period to the right, the number of protons in the nucleus increases. This additionally increases the attraction between the positively-charged nucleus and also negatively-charged electrons, pulling the electrons in tighter and also reducing the atomic radius.

The the smallest atoms room going come be situated toward the upper appropriate of the periodic table. That our provided answer choices, fluorine is the closest to the upper right, and thus has the smallest radius.


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Example concern #22 : periodic Trends


Which that the complying with values go not rise as you move left to best in a duration of the periodic table?


Possible Answers:

Ionization energy


Electronegativity


Electron affinity


Atomic radius


Correct answer:

Atomic radius


Explanation:

Atomic radius will certainly decrease together you relocate to the right, since the atomic number of the aspect will it is in increasing. This outcomes in a much more positively charged nucleus that pulls the electrons closer to the center. Together a result, atomic radius will notably decrease from left come right.

Electronegativity, ionization energy, and also electron affinity all boost to the right of the routine table.


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Example concern #23 : periodic Trends


List the following aspects in order of decreasing atomic radius.

Neon, fluorine, chlorine, oxygen, sodium, magnesium

 


Possible Answers:


*


*


*


*


Correct answer:


Explanation:

Within the same duration of the routine table, atomic radii decrease together there are more charged corpuscle to attract one another, and within the exact same group, atomic radii increases. The increase from the ascending group usually speaking is bigger than the decrease under a period.

Four the the elements provided are in ~ the very same period, so us will ar those four aspects in bespeak of decreasing atomic radii:

*

Now us simply need to place Neon, Fluorine, and also Oxygen, which space in the same period. The tendency of decreasing radii with boosting atomic number is no true for noble gases, together they have actually a finish octet and are slightly bigger to counter electron-electron repulsion from the octet. In bespeak of decreasing atom radius:

*

The boost from the octet is less than the increase from electron-electron repulsion.


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Example inquiry #41 : The periodic Table


Which the the adhering to have the biggest atomic radii within their respective durations (row)?


Possible Answers:

Alkali metals


Transition metals


Halogens


The noble gases


Correct answer:

Alkali metals


Explanation:

The alkali metals are uncovered in the very first group (column) of the routine table, top top the outward side. They have only 1 loose bound electron in their outermost shells, and also their reliable nuclear fee values room low, giving them the biggest atomic radii of every the elements in your periods.


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