Which element in group 1 has the greatest atomic radius?

name atomic radius (pm) Trend
sodium 186
potassium 425
rubidium 244
caesium 262 largest

Which element has the greatest atomic radius?

As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.

Which element in alkali metals has the largest atomic radius?

(A) Trends in the Atomic Radius of Group 1 (IA, Alkali Metals) Elements

Element Atomic Number (Z) Trend
sodium 11
potassium 19
rubidium 37
cesium 55 ↓ largest

Which has largest radius?

Thus O2− has a minimum z-effective thus largest radius.

Why does atomic radius increase down group1?

Progressing down group 1, the atomic radius increases due to the extra shell of electrons for each element. … This is because as the ions get larger the distance between the bonding electrons and the positive nucleus gets larger and reduces the overall attraction between the two.

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How do you find atomic radius?

Atomic radius is determined as the distance between the nuclei of two identical atoms bonded together. The atomic radius of atoms generally decreases from left to right across a period. The atomic radius of atoms generally increases from top to bottom within a group.

Which ion has the largest atomic radius?

1 Answer. Ernest Z. K+ has the largest radius.

Which alkali metal is the biggest?

Cesium is the most volatile of the alkali metals, with a boiling point of 671 °C (1,240 °F). The boiling points of the alkali metals decrease in regular fashion as the atomic numbers increase, with the highest, 1,317 °C (2,403 °F), being that of lithium.

What element in the second period has the largest atomic radius?

The element in the second period that has the largest atomic radius is the Lithium (Li).

Are alkali metals soft or hard?

The alkali metals are solids at room temperature (except for hydrogen), but have fairly low melting points: lithium melts at 181ºC, sodium at 98ºC, potassium at 63ºC, rubidium at 39ºC, and cesium at 28ºC. They are also relatively soft metals: sodium and potassium can be cut with a butter knife.

Which is larger F or Na+?

Na+ has smaller size than F- because both Na+ and F- have equal number of electrons i.e.10 . After losing an electron Na will have less electron cloud and more effective nuclear charge whereas F after gaining an electron will have less effective nuclear charge than the parent atom so the size increases .

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Which has a larger radius Na or Na 1?

So p/e ratio is 1 and Na+ ion nucleus has eleven positive (p) charge and ten negative charge (e). … As is known from the chemistry course, when the element loses electron (turn into cation, with positive charge), the atom radius is getting low, so obviously Na+ is smaller than Na.

Which has a larger radius S or CL?

Answer. Sulphur(S) has the largest atomic radius beaches on moving left to right in a period, Atomic Radius decreases.

Which element in group 1 has the smallest atomic radius?

Trends in Atomic Radius of Group 1 Elements

name atomic radius (pm) Trend
lithium 152 smallest
sodium 186
potassium 425
rubidium 244

Does atomic radius increase down a group?

Atomic radius is the distance from the atom’s nucleus to the outer edge of the electron cloud. In general, atomic radius decreases across a period and increases down a group. Across a period, effective nuclear charge increases as electron shielding remains constant.

Which has a larger atomic radius S or S2?

(ii) Explain why the radius of the S2- ion is larger than the radius of the S atom. The nuclear charge is the same for both species, but the eight valence electrons in the sulfide ion experience a greater amount of electron-electron repulsion than do the six valence electrons in the neutral sulfur atom.

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