Boron has 3 valence electrons.
Au, gold, is atom number 79, so in its (neutral) elemental form it has 79 electrons.
You should understand that while neutral atoms have the same number of protons and electrons, they do not usually have the same number of protons and valance electrons, because except for hydrogen and helium, atoms also have electrons in the inner shells, which are not valance electrons. Therefore, there is no atom which has 7 protons and 7 valance electrons, although there is an element that has 7 protons, and there are several elements that have 7 valence electrons.
Since krypton is a noble gas in the group number 18, it has 8 valence electrons. Eight is the maximum number of valence electrons.
Iodine in its natural form is I2, two iodine atoms bonded with a single covalent bond. There are 6 non-bonded valance electrons on each atom, so there are 12 electrons in the electron-dot structure.
Alkaline earth metals are group 2 elements and have 2 valence electrons.
There are 27 valance electrons.
2 valance electrons
Iodine has 7 valance electrons
3
This is a chemical element. You can find the how many electron in a single atom by using a periodic table.
They have different numbers of valance electrons
6 valence electrons
6 valence electrons
there are six
Two.
3
hundereds