what is a relationship between elements atoms and compounds

The atomic mass of an element is equal to the number of: protons protons plus neutrons protons plus electrons o neutrons

Calculate the speed of sound wave with a frequency of 20hz and a wave length of 3.00m

2x+3 (6x) = -20 what is the answer

Determine the charge on each ion in the following compounds, and name the compound. Spelling counts!

If the temperature of a piece of steel decreases, what happens to its density? a. The density decreases. b. The density increases. c. The density does not change. d. The density first increases, then decreases.

Rearrange in to a quadratic 5.333 = (0.6 + 2p) ² / (0.135 - p)

How hot would a 2.3 L balloon have to get to expand to a volume of 3.0 L? Assume the initial temperature of the balloon is 24 °C, and that the pressure inside the balloon remains constant. A. 3 K B. 42 K C. 128 K D. 390 K

Which pair of nitrogen bases will form a bond in a DNA molecule? a. cytosine and adenine b. adenine and thymine c. guanine and thymine d. thymine and cytosine

Most meteors that fall into the earths atmosphere burn up before reaching the ground. Why is this?

Imagine a chemist is in the lab and trying to make some chemical reactions happen. In one reaction she reacts chemicals in an exothermic reaction and there is an increase in entropy.