Which alkaline earth metal is the smallest?
Beryllium
Beryllium (Be), the smallest alkaline earth metal, is atomic number 4 on the periodic table, has an atomic weight of 9.01 amu (atomic mass unit), and melting and boiling points of 2,348.6°F (1,287°C) and about 4,479.8°F (2,471°C), respectively. It was discovered by N. L.
What is the alkaline earth metal with the most protons?
radium
With an atomic number of 88 and an atomic mass of 226, radium is the largest of the alkaline earth metals. Eighty-eight protons and 138 neutrons are…
Which alkaline earth metal is most likely to lose an electron?
In fact, for the alkali metals (the elements in Group 1), the ease of giving up an electron varies as follows: Cs > Rb > K > Na > Li with Cs the most likely, and Li the least likely, to lose an electron.
Which alkali metal is the least reactive?
lithium
Concept: The alkali metals are soft and silvery. They are also the most reactive metals having the lowest ionization energies. They react readily with water, lithium being the least reactive and potassium the most.
Which metal has the smallest atom?
helium
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.
Are alkaline earth metals more reactive than alkali metals?
Why are alkaline Earth metals less reactive than alkali metals? A: It takes more energy to remove two valence electrons from an atom than one valence electron. This makes alkaline Earth metals with their two valence electrons less reactive than alkali metals with their one valence electron.
Which one of the following is an alkaline earth metal?
The alkaline earth metals are six chemical elements in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
Which element is less reactive?
Chemical Properties of Noble Gases Noble gases are the least reactive of all known elements. That’s because with eight valence electrons, their outer energy levels are full. The only exception is helium, which has just two electrons.
Why are alkaline earth metals less reactive than alkali?
Which metal is lightest metal in the world?
Lithium is considered to be the lightest or the least dense metal on earth with a density of 0.534 g/cm3.
What’s the smallest atom?
hydrogen atom
If by “biggest” and “smallest”, you mean mass (which is a measure of how much matter is there), then the smallest is the hydrogen atom with one proton and one electron. Since electrons are about 2000 times less massive than protons (and neutrons), then the mass of an atom is mostly from the protons and neutrons.
Why are alkaline earth metals generally less reactive than alkali metals?
The outermost electrons of the alkaline earth metals (group 2) are more difficult to remove than the outer electron of the alkali metals, leading to the group 2 metals being less reactive than those in group 1. These elements easily form compounds in which the metals exhibit an oxidation state of 2+.