Explanation:

Ionization energy goes up across the period and under as girlfriend go down the group. This is the energy required to remove an electron. That the noted elements it would certainly be hardest to remove an electron from Flourine together the positive nucleus close come the electron orbitals has higher attractive force.

You are watching: Which of the following has the smallest radius

Explanation:

Helium has the smallest atomic radius. This is because of trends in the periodic table, and also the efficient nuclear charge that stop the valence electron close come the nucleus. Atom radius decreases as you move throughout a period from left to right and decreases together you relocate up a team from bottom to top. Due to the fact that He is at the top right-hand corner of the table, that must have the smallest atomic radius.

Explanation:

The routine table permits you come follow general guidelines or "trends" that are shown on the table. Atom radius is one such trend. Together you relocate down in groups, further shells are added to the atom which outcomes in an increase in radius. Together you move to the right on the routine table, the atom charge boosts which pulls the elctrons closer come the nucleus. As a result, the atom radius will decrease when moving to the right.

Explanation:

Atomic radius decreases as you relocate left to right on the periodic table. As atomic number increases, so does the variety of positive protons in the nucleus. Come the far left of a period, electrons are widespread within a brand-new electronic shell. To the much right that the period, the electrons still occupy the same shell, yet experience greater attractive force toward the nucleus because of the greater number of protons present.

While that is true that flourine is the most electronegative element, this walk not influence atomic radius (though the two trends follow similar patterns).

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### Example inquiry #11 : routine Trends

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

Cs and Bi

Be and B

As and also Se

Na and also Cl

Fe and also Br

Na and Cl

Explanation:

The atomic radius of elements decreases together one moves from left to right throughout the routine table. The level to i m sorry lithium has a larger atomic radius 보다 fluorine is most similar to the distinction between an additional pair of facets within the same groups, the are also found ~ above the left and also right political parties of the table.

Fluorine and also chlorine room both halogens, and also lithium and also sodium room both alkali metals. Fluorine and also lithium space both in the 2nd period, and sodium and also chlorine space both in the third. As you relocate from lithium to fluorine across the table, you will see similar changes and patterns together if friend were relocating from sodium to chlorine.

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### Example question #46 : The periodic Table

Chlorine

Oxygen

Fluorine

Sulfur

Sulfur

Explanation:

When predicting exactly how atomic radius will change as you relocate along the regular table, remember these 2 trends.

1. As you relocate down the table in a offered group, the atom radius of the atoms will increase.

2. As you move left to appropriate in a provided period, the atom radius will decrease.

Knowing this, we can compare the feasible options. Sulfur and chlorine room in the shortest period, for this reason they have actually the biggest atomic radii. Since sulfur is come the left that chlorine ~ above the regular table, that will have a larger atomic radius. As a result, sulfur has the biggest atomic radius out of the feasible options.

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### Example inquiry #41 : The routine Table

Which that the complying with atoms has the the smallest atomic radius?

Sulfur

Nitrogen

Chlorine

Fluorine

Oxygen

Fluorine

Explanation:

As friend move throughout a single period (row) ~ above the routine table, the atom radius that each succeeding atom decreases. As you relocate down a solitary group (column), the atom radius that each succeeding atom increases. As you move down a group, the maximum power level the the valence shell increases, for this reason increasing the dimension of the electron cloud and also atomic radius. As you move across a period to the right, the number of protons in the cell core increases. This also increases the attraction in between the positively-charged nucleus and also negatively-charged electrons, pulling the electron in tighter and reducing the atomic radius.

The the smallest atoms are going come be situated toward the upper best of the regular table. Of our provided answer choices, fluorine is the closest come the top right, and also thus has actually the the smallest radius.

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### Example question #42 : The routine Table

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

Electron affinity

Ionization energy

Electronegativity

Explanation:

Atomic radius will decrease together you move to the right, due to the fact that the atomic variety of the aspect will it is in increasing. This results in a more positively fee nucleus that pulls the electrons closer come the center. Together a result, atomic radius will especially decrease from left to right.

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

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### Example concern #41 : The regular Table

List the following elements in stimulate of decreasing atomic radius.

Neon, fluorine, chlorine, oxygen, sodium, magnesium

Explanation:

Within the same period of the routine table, atom radii decrease as there are an ext charged particles to entice one another, and also within the same group, atomic radii increases. The rise from the ascending group generally speaking is bigger than the decrease under a period.

Four of the elements detailed are in ~ the very same period, so us will location those four facets in stimulate of decreasing atomic radii:

Now we simply need to place Neon, Fluorine, and also Oxygen, which are in the exact same period. The trend of decreasing radii with increasing atomic number is not true for noble gases, together they have actually a complete octet and also are slightly larger to balance out electron-electron repulsion from the octet. In order of decreasing atom radius:

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

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### Example question #41 : The regular Table

Which the the complying with have the largest atomic radii within your respective periods (row)?

Halogens

Alkali metals

The noble gases

Transition metals

Alkali metals

Explanation:

The alkali steels are found in the very first group (column) the the routine table, on the leftmost side. They have only 1 loosely bound electron in their outermost shells, and also their reliable nuclear fee values space low, offering them the biggest atomic radii of every the aspects in your periods.

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