Answer:
Cement is a combination of calcium, silicone, aluminum, iron and lots of other ingredients to make side walks, home made crafts, etc. The person who invented concrete is Joseph Aspdin.
Explanation:
Answer:
A
Explanation:
I'm right I took the test
Answer:
3 because it the element that combined the form
Answer:
evaporation?
Explanation:
evaporate the water leaving behind the sand?
Mass number is equal to the number of protons plus the number of neutrons in a nucleus of an atom
