Answer:
Interstellar medium
Explanation:
The interstellar medium (ISM) is the matter and radiation that exists in the space between the star systems in a galaxy. This matter includes gas in ionic, atomic, and molecular form, as well as dust and cosmic rays.
Answer:bromine , neon , helium , argon , lithium , beryllium
Explanation:
Answer:
10
Explanation:
Basically same as last question but the number is before the compound :)
Answer:
Backbone
Explanation:
Organisms that have backbones are known as vertebrates, while the ones without a backbone are classified as invertebrates.
