Only one. The first shell can have up to 2 electrons.
the first shell holds 2 and the second one holds 8 so you would need 2 shells!
Helium (He) and Calcium (Ca) both have 2 valence electrons.
2 electrons in the K shell and 8 electrons in the L shell
In the first shell there are two electrons and in the second shell there are six electrons, but only the electrons in the second (outer) shell are valence electrons.
According to one of Lewis' theories, each shell has a maximum number of electrons using the formula 2n2 where n = the shell number. For example: 1st shell = 2(1)2 = 2 electrons maximum; 2nd shell = 2(2)2 = 8 electrons maximum.
10 electrons would need 2 shells to accommodate them. The first shell can hold up to 2 electrons, while the second shell can hold up to 8 electrons.
16 electrons would fill up the first four shells in an atom: 2 electrons in the first shell, 8 electrons in the second shell, 4 electrons in the third shell, and 2 electrons in the fourth shell.
An atom of oxygen needs 2 electrons to complete its outer shell, which can hold a total of 8 electrons. Oxygen has 6 electrons in its outer shell, so it will gain 2 electrons through bonding to achieve a full valence shell.
Oxygen needs 2 electrons to fill its outer shell, which is the second electron shell. This shell can hold a maximum of 8 electrons. Oxygen has 6 electrons in its neutral state, so it will gain 2 electrons to achieve a stable electron configuration similar to a noble gas.
20 electrons would need 4 shells. The first shell can hold up to 2 electrons, the second shell can hold up to 8 electrons, the third shell can hold up to 18 electrons, and the fourth shell can hold up to 32 electrons.
the first shell holds 2 and the second one holds 8 so you would need 2 shells!
Helium (He) and Calcium (Ca) both have 2 valence electrons.
2 electrons in the K shell and 8 electrons in the L shell
In the first shell there are two electrons and in the second shell there are six electrons, but only the electrons in the second (outer) shell are valence electrons.
There are 2 electrons on the outermost shell of calcium.
Phosphorous has 2 elements in K-shell, 8 in L-shell and 5 in M-shell.
According to one of Lewis' theories, each shell has a maximum number of electrons using the formula 2n2 where n = the shell number. For example: 1st shell = 2(1)2 = 2 electrons maximum; 2nd shell = 2(2)2 = 8 electrons maximum.