This element is the lightest alkali metal and it is very reactive. This metal is used for the production of dry cells and storage batteries (for cell phones, car batteries, etc.). The carbonate of this metal is used for the treatment of some mental decease.
This is a halogen element, lustrous solid, which volatilizing at ordinary temperatures into a blue-violet gas with an irritating odor. Ample amounts of this element are required by the human body for the proper function of the thyroid gland.
Make it easier 🤭
53
I
Iodine
35
Br
Bromine
85
At
Astatine
Correct! 🥳
Incorrect 😞It's...
Iodine
20
20
Hard
This element is classified as a lanthanide and it is the most abundant of the rare-earth elements of the earth’s crust. It is the most reactive of the rare-earth metals and is used as a catalyst to refine petroleum.
Make it easier 🤭
58
Ce
Cerium
68
Eu
Erbium
71
Lu
Lutetium
Correct! 🥳
Incorrect 😞It's...
Cerium
Need a tutor?
Get $25 towards your tutor. Proven, teachery, and great.