It is symbols to make it easier and to save space!
Answer:
a
Explanation:
how well a material shines or reflects light
Answer:
Allotropes
Explanation:
Because it is the same element the chemical conposition is the same i.e. The atoms that make the substances are identical. Allotropes can be crystalline or amorphous and sometimes they can be varied in properties.
Iron nails are attracted to the magnet
Answer:large
Explanation:
As the temperature increases, materials with large coefficients of linear expansion increases a lot in size
