Which of the following elements could gain stability by forming a covalent bond with one atom of itself? Select all that apply. The letters He with 2 dots above. © The letter H with 1 dot to the right. The letter Cl with 1 dot to the left, 2 dots above, 2 dots to the right, and 2 dots below. The letters Na with 1 dot to the right.

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

How have the greenhouse gasses increased from the year 2000 to 2018