At room temperature, table salt is a solid and mercury is a liquid. what conclusion can you draw about the melting points of these substances?

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

Define a is a tiny pavket of energy

Which of the following units is not an official si unit