7
Halogen family members, or elements in group 17, have 7 valence electrons.
Halogens each have 7 valence electrons.
Halogens are group 17 elements. They have 7 valence electrons.
Assuming you mean "halogen": 1, usually. Things like "perchlorate ion" are something else again...
7 electrons are on the outer (valence) shells of all halogens
Fluorine is a halogen. All halogens have 7 valence electrons. There are thus 7 valence electrons for Fluorine, 2 in the 2s orbital, and 5 in the 2p orbitals.
All have six valence electrons.
how many valence electrons does family 1 have
The number of electrons in the valence shell of a halogen is 7. What is probably the most significant feature of halogens is that they all are one electron short of the number of electrons required to fill their valence shells, eight. That means they will have similar chemical properties, i.e., they all are on the lookout to borrow one electron.
4 electrons
it is in the oxygen family and has 6 valence electrons it requires 2 electrons
7