Calcium has 20 electrons
period 3 elements in the periodic table have 3 electrons in there outher shell hence the name.
Chlorine has 17 electrons. It is displayed as atomic number in periodic table.
Chlorine (Cl) has 7 valence electrons, as it is in Group 17 or 7A of the periodic table. This means it has 7 electrons in its outermost energy level.
For example the elements from the group 1 of the periodic table.
This is a chemical element. You can find the how many electron in a single atom by using a periodic table.
8 all together
There are 2 electrons on the outermost shell of calcium.
its in column two on the periodic table, so therefor it has two valence electrons .
There are 2 electrons in valence shell of calcium. :-)
Calcium has 2 valence electrons. It is in group 2 of the periodic table, which means it has 2 electrons in its outermost energy level.
Calcium is in group II of the periodic table meaning that it has 2 valence electrons. These are the electrons that are involved in making a chemical bond, so the answer to your question is TWO.
I believe it is 2, seeing it is a metal, and has 2 valence electrons. Correct me if I'm wrong, I don't have my periodic table with me (Calcium -> Ca?).
I am not sure what you mean by atoms, i think you mean electrons (part of an atom).Calcium is in Group 2 of the periodic table so this means that in order to become stable it will lose 2 electrons.
The d block of the periodic table contains 10 valence electrons.
Calcium typically loses 2 electrons to achieve a stable electron configuration, forming a Ca2+ cation. This allows calcium to achieve a full outer energy level of 8 electrons, similar to a noble gas configuration.
period 3 elements in the periodic table have 3 electrons in there outher shell hence the name.
Xenon has 54 electrons.