Are all elements abbreviated with one or two letters? if not name same that aren't

Bacillus megaterium is a mesophile that forms endospores. considering endospores are resistant to high heat, at what temperature will bacillus megaterium survive for experiment 17a if endospores are present?

How many valence electrons do transition metals have?

Matter is niether created nor destroyed in any chemical change. Is this a theory or a law?

What geometric shape is the water molecule? Tetrahedral Bent Trigonal pyramidal Linear

A zinc coating is added to the surface of a tin component to provide corrosion protection to the tin. Assume that the coating adheres to (physically contacts) the underlying tin.

Think about a neutral magnesium atom. Then think of a magnesium ion with a 2+charge. How are these two alike? How are they different? Be sure to use the terms proton, neutron, and electron in your answer.

What subatomic particle is specifically responsible for combining the atoms together to form a new substance?

A chemist reported that 100 gallons of a gas were available in a laboratory. Which property of the gas did the chemist report?

Is the water density higher than the aluminum density

How many moles of molecular oxygen (o2) are consumed in the complete combustion of one mole of pentane (c5h12) ?