Physical properties
What are the physical properties of Fluorine ?
Boiling, Melting, and Density
Name one element in Halagon group.
Fluorine, Chlorine, Bromine, iodine, and Astatine
Why was hydrogen placed in group 1A and does not share the characteristics of the group 1A elements?
Because it have one valence electron, and is an non-metal gas
Are Halogens metal of nonmetal?
Nonmetal
To prevent tooth decay
What are the physical properties of Chlorine ?
Greenish-yellow gas temperature, soluble in water, and suffocating odor
which Halogen is most reactive?
fluorine
Why does Hydrogen act as both a metal and a nonmetal ?
Metal- it can donate an electron
Nonmetal- can accept electron from hydride ion
What type of elements do Halogens usually react with?
Metals
What are some uses of Chlorine and Iodine ?
What are physical properites of Bromine?
Reddish-brown highly volatile liquid with heavy vapor of the same color. Strong awful smell.
chlorine
1
What charge do Halogens usually form when they gain an electron ?
- 1
What is Iodine used for in medicine ?
Antiseptic
What are physical properties of Iodine?
Shiny bluish-black solid. When it sublimes, produces violet vapor
which Halogen is found in the table salt?
Chlorine
What type of bond does hydrogen mostly form with halogons ?
Covalent bonds
What happens to reactivity when you go down the halogen group ?
It decreases
What is Bromine used for ?
Flame retardants
What are physical properties of Astatine?
(predicted) black or dark metallic. Very volatile, readily vaporizing due to its own radioactivity
which Halogen is radioactive and rare?
Astatine
What is form when hydrogen reacts with halogens ?
Hydrogen halides
Why do all group 7 elements have similar chemical properties ?
What is chlorine commonly used for ?
Disinfecting water