they are making metal bonds. that is the purpose.
Calcium is a metal that has two valence electrons.
All alkali earth metals have 2 valence electrons.
Beryllium is the alkaline earth metal that has 2 valence electrons.
Metalloids typically have 3 to 6 valence electrons. This intermediate number of valence electrons allows metalloids to exhibit both metal and non-metal characteristics.
Nonmetals attract electrons.
2 valence electrons are in iridium because iridium is a transition metal. Most transitions metal would have 2 valence electrons because the group before the transition metals are the alkaline-earth metals which contains 2 valence electrons in that group making the transition metals have 2 valence electrons.
Calcium is a non metal element. There are 20 electrons in a single atom.
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Most of the properties of a metal, including lustre, are due to the metallic bonding of the electrons.
At least one, and usually all, of the valence electrons of the metal atom is donated to the valence shell of the nonmetal atom.
Valence electrons
== == When metals react with other elements, the atoms of the metals give up their valence electrons.