What elements has 7 valence electrons?
The elements in this family are fluorine, chlorine, bromine, iodine, and astatine. Halogens have 7 valence electrons, which explains why they are the most active non-metals.
What is the name of the group with 7 valence electrons?
halogens
The number of valence electrons
| Periodic table group | Valence Electrons |
|---|---|
| Group 15 (V) (pnictogens) | 5 |
| Group 16 (VI) (chalcogens) | 6 |
| Group 17 (VII) (halogens) | 7 |
| Group 18 (VIII or 0) (noble gases) | 8** |
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Jun 5, 2019
Which of the following atoms has 7 electrons?
The Group 7 elements – fluorine (F), chlorine (Cl), bromine (Br), iodine (I) and astatine (At) – have seven electrons in the outer shell.
Does Tennessine have 7 valence electrons?
Tennessine is expected to be a member of group 17 in the periodic table, below the five halogens; fluorine, chlorine, bromine, iodine, and astatine, each of which has seven valence electrons with a configuration of ns2np5.
Which element has 7 valence electrons 2 points?
A: An atom of a group 17 element such as chlorine has seven valence electrons.
Which element has 7 valence electrons and 3 electron shells?
Chlorine has seven valence electrons. Chlorine has atomic number 17. The atomic number is the number of protons present in the nucleus of an atom. All the atoms of an element have same atomic number.
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 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.