Which of these is NOT a cause of the heat inside Earth?

A.) Volcanoes

B.) radioactive decay

C.) gravitational contraction

D.) bombardment by asteroids

Fluorine is considered which of the following? ionic compound atomic element molecular element molecular compound none of the above

Which subatomic particle is the lightest? (a) neutron (b) proton (c) electron (d) all of the above (obviously not the last one, I guess)

A centimeter an millimeter differ from each other by a factor of?

Write the complete electron configuration of germanium, element 32

What is the nature of the P-O bond in phosphorus pentoxide (P2O5) ? A.) nonpolar covalent B.) moderately polar covalent C.) highly polar covalent D.) ionic E.) polar ionic

An experimental procedure says to accurately weigh approximately 1 g of substance on analytical balance. Which of the following measurements are consistent with these instructions? Select all that apply. 1.0456 g 1.0 g 0.9811g 1 g 1.01g O 0.99

What type of mixture is 100 ml of water with a little bit of salt?

Which statement explains why meiosis haploid cells rather than diploid cells

Which factors can affect the amount of coco mix that can be dissolved in water? Check all that apply

If 25% of a radioactive element remains after 1,000 years, what is the half-life?