Table of Contents
Do Group 7 consist of molecules?
The group 7 elements exist as diatomic molecules . Their chemical formulae are F 2, Cl 2, Br 2 and I 2. The bond between the atoms in a molecule is very strong, but the forces of attraction between molecules are weak. This explains why group 7 elements have low boiling points.
What are the properties of Group 7 elements?
Properties of the group 7 elements
- Fluorine is a pale yellow gas.
- Chlorine is a poisonous green gas.
- Bromine is a toxic red-brown liquid.
- Iodine is a dark grey solid which gives off a purple vapour when heated.
- Astatine is a black solid.
Which family of elements is in Group 7?
Group 7, numbered by IUPAC nomenclature, is a group of elements in the periodic table. They are manganese (Mn), technetium (Tc), rhenium (Re), and bohrium (Bh). All known elements of group 7 are transition metals.
Is Group 7 a metal?
Group 7 contains non-metal elements placed in a vertical column on the right of the periodic table . The elements in group 7 are called the halogens .
What is Group 7 on the periodic table?
Lr. Group 7A (or VIIA) of the periodic table are the halogens: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
Why are Group 7 elements called the 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.
What are the 7 elements of science?
There are seven diatomic elements: hydrogen, nitrogen, oxygen, fluorine, chlorine, iodine, bromine. These elements can exist in pure form in other arrangements….The seven diatomic elements are:
- Hydrogen (H2)
- Nitrogen (N2)
- Oxygen (O2)
- Fluorine (F2)
- Chlorine (Cl2)
- Iodine (I2)
- Bromine (Br2)
Why are Group 7 elements called halogens?
What element is in Period 7 group 7?
halogens
The Group 7 elements are called the halogens. They are placed in the vertical column, second from the right, in the periodic table . Chlorine, bromine and iodine are the three common Group 7 elements….Properties and uses of the halogens.
| Element | Properties | Typical use |
|---|---|---|
| Iodine | Grey solid | Sterilising wounds |