Quick Answer: Which alkaline earth metal has the largest atomic radius?

Barium (symbol:Ba) is the group 2 or alkaline earth metal that has the largest atomic radius, equal to 222 pm. Atomic number of Barium is 56.

Which alkali metal has the largest atomic radius?

(A) Comparison of Atomic and Ionic Radius of Group 1 (IA, alkali metals) Elements

Element Symbol of Atom Trend
sodium Na
potassium K
rubidium Rb
cesium Cs ↓ largest

What is the largest alkaline earth metal?

Radium, the heaviest – with an atomic number of 88 – was discovered by Marie and Pierre Curie in 1898 and is the only radioactive member of these metals.

Which metal has the largest atomic radius?

Atomic radii vary in a predictable way across the periodic table. 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.

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What has the smallest atomic radius?

Explanation: Helium has the smallest atomic radius. This is due to trends in the periodic table, and the effective nuclear charge that holds the valence electrons close to the nucleus.

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.

What is the lightest alkaline earth metal?

Calcium is the lightest alkaline earth metal (density=1.55gcm-3).

What are the 2 most common alkaline earth metals?

Alkaline-earth metal, any of the six chemical elements that comprise Group 2 (IIa) of the periodic table. The elements are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).

What do you call the element from atomic number 57 71?

What do you call the element series from atomic number 57-71? Silicon.

Which noble gas has the largest atomic radius?

As you go down a group, the atomic radius increases because you are adding energy levels that are farther away from the nucleus. Smallest to Largest: Helium.

Largest to Smallest:

  • Helium (highest ionization level in the periodic table)
  • Neon.
  • Argon.
  • Krypton.
  • Xenon.
  • Radon.

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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Does atomic radius increase from left to right?

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 has largest radius?

Since the atomic radius decreases in a period but increases down the group so Sr of group II and period V is largest in size.

What element has an atomic radius of 180?

Atomic Radius of the elements

Helium 31 pm 161 pm
Bromine 94 pm 180 pm
Phosphorus 98 pm 183 pm
Selenium 103 pm 184 pm
Xenon 108 pm 185 pm

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).

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