Answer:
Light energy is a form of electromagnetic radiation. Light consists of photons, which are produced when an object's atoms heat up. Light travels in waves and is the only form of energy visible to the human eye.
Explanation:
Answer:
There are Seven periods in the periodic table
Answer:
you need to be more specific
try adding a picture of the samples
Explanation:
I believe A.
Calcium and potassium help with blood pressure, muscles, and bones.
For b, there is little helium in the atmosphere.
For C, the center is made of neutrons and protons, electrons are far away.