Each chemical element has an atomic number and a mass number. the atomic number refers to the number of element has, while the mass number refers to the number of the element has.

Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change

Which change to the system wood cause the freely-moving piston to lower?

I’m an electrically neutral atomic any element, there are equal numbers of