Which of the following statements is true?

compounds keep the chemical properties of the elements they are made from.

molecules are made of two or more atoms.

john dalton was the first person to propose the idea of an atom.

all of the above.

the largest known star in the universe is uy scuti, a hypergiant with a radius around 1,700 times larger than the sun.jul 26, 2018

explanation:

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)