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Questions and Answers
Atomic radius ___ across a period.
Atomic radius ___ across a period.
Decreases
Which of the following has the largest atomic radius?
Which of the following has the largest atomic radius?
- Cl
- O
- Na (correct)
- B
In alkali metals, the atomic radius of potassium is greater than ____.
In alkali metals, the atomic radius of potassium is greater than ____.
Lithium
Which of the following halogens has the largest atomic radius?
Which of the following halogens has the largest atomic radius?
Which of the following has the smallest atomic radius?
Which of the following has the smallest atomic radius?
Compared to the atomic radius of a carbon atom, the atomic radius of a silicon atom is larger because of an increase in:
Compared to the atomic radius of a carbon atom, the atomic radius of a silicon atom is larger because of an increase in:
The atomic size of silicon is greater than ____.
The atomic size of silicon is greater than ____.
_____ has the largest atomic radius.
_____ has the largest atomic radius.
Considering the second period elements, which of the following has the largest atomic radius?
Considering the second period elements, which of the following has the largest atomic radius?
The atomic radius is defined as...
The atomic radius is defined as...
Atomic radius is determined as...
Atomic radius is determined as...
The atomic radius of atoms generally...
The atomic radius of atoms generally...
The atomic radius of atoms generally...
The atomic radius of atoms generally...
Which of the following is/are true?
Which of the following is/are true?
Atomic radius generally ____ from left to right across a period of the periodic table.
Atomic radius generally ____ from left to right across a period of the periodic table.
In the periodic table, the element with the largest atomic radii is found in:
In the periodic table, the element with the largest atomic radii is found in:
Which of the following has the largest atomic radius among Group 16 elements?
Which of the following has the largest atomic radius among Group 16 elements?
Which of the following is the correct order of increasing size of atomic radii?
Which of the following is the correct order of increasing size of atomic radii?
Which element has a larger atomic radius than phosphorus?
Which element has a larger atomic radius than phosphorus?
Among the following, which element of the third period has the largest atomic radius?
Among the following, which element of the third period has the largest atomic radius?
Which of the following is the correct order of the increasing size of atomic radii?
Which of the following is the correct order of the increasing size of atomic radii?
The largest atom in the sixth period is...
The largest atom in the sixth period is...
Which of the following is larger in atomic size?
Which of the following is larger in atomic size?
Atomic radii ____ while moving from scandium to chromium.
Atomic radii ____ while moving from scandium to chromium.
Which of the following elements has the largest atomic radius?
Which of the following elements has the largest atomic radius?
____ has the smallest atomic radius.
____ has the smallest atomic radius.
The atomic radius of aluminum is greater than ____.
The atomic radius of aluminum is greater than ____.
In the periodic table, moving right from tantalum (Ta) to mercury (Hg), the atomic radii:
In the periodic table, moving right from tantalum (Ta) to mercury (Hg), the atomic radii:
Which of the following best explains why atomic radius decreases from left to right across a period?
Which of the following best explains why atomic radius decreases from left to right across a period?
Upon moving down a group, the distance between the valence electrons and the nucleus ____.
Upon moving down a group, the distance between the valence electrons and the nucleus ____.
Arrange the following atoms in order of decreasing atomic radius:
Arrange the following atoms in order of decreasing atomic radius:
The covalent radius of bromine is:
The covalent radius of bromine is:
Why is atomic radius not a well-defined quantity?
Why is atomic radius not a well-defined quantity?
What will be the atomic radius of copper, if the distance between two adjacent copper atoms in metallic copper is 256 pm?
What will be the atomic radius of copper, if the distance between two adjacent copper atoms in metallic copper is 256 pm?
Out of Sb, Bi, Md, and Tm, ____ has the smallest atomic size and ____ has the largest atomic size.
Out of Sb, Bi, Md, and Tm, ____ has the smallest atomic size and ____ has the largest atomic size.
Which of the following is the atomic radius of chlorine if the internuclear distance between two chlorine atoms is 198 pm?
Which of the following is the atomic radius of chlorine if the internuclear distance between two chlorine atoms is 198 pm?
The units for atomic radii are....
The units for atomic radii are....
The atomic radius of a nitrogen atom is 70 pm. What is the distance between the nuclei of two bonded nitrogen atoms?
The atomic radius of a nitrogen atom is 70 pm. What is the distance between the nuclei of two bonded nitrogen atoms?
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Study Notes
Atomic Radius Trends
- Atomic radius decreases across a period due to increased nuclear charge attracting electrons more strongly.
- Atomic radius increases from top to bottom in a group because of additional principal energy levels.
Comparison of Elements
- Among various elements, Rubidium has the largest atomic radius.
- Iodine is the halogen with the largest atomic radius.
- Fluorine has the smallest atomic radius among the provided options.
- Potassium has a larger atomic radius than Lithium in alkali metals.
- Phosphorus has a smaller atomic radius than Silicon, which is larger due to more principal energy levels.
- Aluminum has a greater atomic radius than Boron.
Periodic Position
- The element with the largest atomic radii in the periodic table is found in the lower left.
- Cesium is identified as the largest atom in the sixth period.
- Sodium has the largest atomic radius among the elements in the third period.
Atomic Radius Measurements
- Atomic radius is defined as half the distance between identical bonded atoms' nuclei.
- The atomic radius of Chlorine is calculated at 99 pm, given an internuclear distance of 198 pm.
Trends in Specific Groups
- Atomic size comparisons reveal that Polonium (Po) has the largest atomic radius among Group 16 elements.
- The order of increasing size of atomic radii for elements follows: Al < Ga < In and Si < Sn < Pb.
General Observations
- Upon moving from Scandium to Chromium, the atomic radius decreases.
- The atomic radius of Silicon is noted to be the smallest and the distance between valence electrons and the nucleus increases down a group.
- The boundary of an electron cloud is not well-defined, hence atomic radius is not a precise measure.
Calculating Atomic Radius
- If the distance between two adjacent copper atoms is 256 pm, the atomic radius is 128 pm.
- Atomic radii are typically measured in picometers (pm), equivalent to 10^-12 meters.
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