In modern time: NASA would probably triple their efforts to build reusable spacecraft that can land on earth, And search and collect rarer metals (likely from asteroids).
They were rare metals that are found in the earth.
Rare earth metals tend to be soft and goldish in color.
No.
Those metals which are kept deep inside the earth. They are alkaline in nature.
Alkali metals, Alkali Earth metals, Rare Earth metals, Transition metals, Non metals, Halogens, Inert gases
beryllium
non-metals .... alkali metals....transition metals....alkali earth metals....rare earth metals....other metals....halogens....inert elements
16.546 valence electrons are located in all rare earth elements.
Lathanides
The meteor impacts are responsible for the profusion of rare earth metals in the rock of the Northern Quebec.
Rare earth metals are widely used for technological advancement in the 21st technology. It commonly used for car batteries, car engine and car frames. Aside from that, rare metals are also present in cellphones and some other gadgets and devices.
There are eight classifications of elements in the periodic table. They are: Non-metals, transition metals, rare earth metals, halogens, alkali metals, alkali earth metals, other metals and inert elements.