# What group of elements has 7 electrons in its outer shell?

## What group of elements has 7 electrons in its outer shell?

The Group 7 elements – fluorine (F), chlorine (Cl), bromine (Br), iodine (I) and astatine (At) – have seven electrons in the outer shell. Group 0 elements – helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) and radon (Rn) – have full outer shells.

## What are elements with 7 electrons called?

Example 1: Fluorine, chlorine, bromine, and iodine each have 7 electrons in their outermost shell. These so-called halogens are also quite similar in their chemical behavior.

What element has 7 electron shells?

So… for the element of NITROGEN, you already know that the atomic number tells you the number of electrons. That means there are 7 electrons in a nitrogen atom. Looking at the picture, you can see there are two electrons in shell one and five in shell two.

### Which elements contain 7 valence electrons in their outer shell?

Fluorine (F) and chlorine (Cl), as group 17 elements, have seven electrons in their outermost shells.

### What is group 7 called in the periodic table?

the halogens
Group 7 Elements Also called the halogens.

What element contains 7 protons?

nitrogen
If it has 7 protons, that’s nitrogen. But the logic of the periodic table also relies upon the number and organisation of electrons in an atom. Let’s take chlorine as an example. It is positioned in group 7 of the periodic table because it has seven electrons in the outermost shell of electrons.

## Which elements have complete outer shells?

Group 18 elements (helium, neon, and argon are shown) have a full outer, or valence, shell. A full valence shell is the most stable electron configuration.

## What element has 7 energy levels and 1 valence electron?

Valence electrons help in predicting chemical reactions. For example, since hydrogen (H) is in group 1, it has 1 electron in its outer energy level. Chlorine (Cl), which is in group 17, has 7 electrons in its outer energy level and is one electron short of having a “full” outermost energy level.

What are the 7 valence electrons?

Any element in the halogen group will have seven valence electrons. These elements include fluorine, chlorine, bromine, iodine, and astatine.

### Does chlorine have 7 valence electrons?

The atomic number of chlorine is 17. Hence it has got 7 electrons in its outermost shell. There are 7 valence electrons in the chlorine atom.

### Why is group 7 called halogens?

Group 7 elements form salts when they react with metals. The term ‘halogen’ means ‘salt former’, which is why Group 7 elements are called halogens. In general the halogens comprise the most reactive group of non-metals. The halogens are so reactive that they cannot exist free in nature.

Why do group 7 elements gain an electron?

The group 7 elements want to gain one more electron so that they have a stable electronic structure. The smaller the atom, the easier it is to grab an electron from another atom, making the atom more reactive. As you go down group 7, the atomic radius increases and it becomes more difficult to attract another electron.