There are 12 electrons in the electron shell of magnesium, the same number as protons. As for the outermost shell, it would be 3s2, meaning there are two electrons in the third "s" shell.
7
The valence shell is the outter most shell that contains the most electrons. To find out how many valences there are you would mulitply the electrons. C3H8= (6)3 + (1)8=26 the outer valence shell will be 20.
The outermost shell of an atom can hold a maximum number of electrons equal to 8 for the first 20 elements on the periodic table. This is based on the octet rule, which states that atoms tend to gain, lose, or share electrons in order to achieve a full outer electron shell with 8 electrons.
1st shell: 2 electrons, 2nd shell: 8 electrons, 3rd shell: 8 electrons, 4th shell: 4 electrons, 5th shell: 0 electrons, 6th shell: 0 electrons.
It has 5 electrons in its outermost shell.
there are two electrons the first shell hold
Sulphur has 6 electrons in its outermost shell.
There are two electrons in the valance shell of helium. Since this is the first shell, it is filled by two 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.
Boron has three electrons in its outer shell
Vanadium has on the outer shell two electrons.