I attached the image. Options for 1st blank:
A. each atom and the shared electrons
B. the nuclei of the two atoms
C. the valence electrons of the two atoms

Options for 2nd blank:
A. energy levels
B. protons and neutrons
C. valence electrons

i just got this problem. it's 90.3

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.

no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.