According to the Periodic Table of Elements, Calcium has:

A. 20 protons and 20 electrons

B. 40.08 protons

C. 20 protons and 20.08 electrons

D. 20 protons and zero electrons

Particles in a liquid move around just as freely as particles in a solid.

What types of intermolecular forces exist between nh3 and cbr4?

Sarah is on a road trip with a friend. their car has a 15-gal tank and averages 30 mi/gal. how many miles can they travel on a full tank of gas?

What do the carbon, oxygen, and nitrogen cycles all have in common? a. They all include an exchange of gases with the atmosphere. b. None of the cycles are biogeochemical cycles. c. They are all byproducts of photosynthesis. d.

Can water vapor be treated as an ideal gas? discussbriefly.[5]

When a soda can is dropped, it should not be immediately opened. Why? (A) The soda will squirt out because of decreased temperature. (B) The soda will squirt out because of increased temperature.

Explain the difference between layers and band.

A metal block has a mass of 122 grams and measures 2cm x 2cm x 4cm. What is the density of the block?

What are valency and radicals

Tell me some bad effects of Ethanol