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It is not possible to state the absolute mass or weight of any material object. At the most fundamental level, one can only state that a hydrogen atom has the mass of a single proton and a single electron; it is impossible to know the absolute masses of those subatomic particles. This basic relationship, however, provides the means whereby other atoms can be ascribed their corresponding masses and the effects of accumulated mass become observable.
Salem Press Encyclopedia of Science, 2022. 3p.
Physics is the study of the interaction of matter with its environment. Matter is defined as anything that has mass and can be measured in some way. The base unit of matter is the atom. An atom consists of the three principal subatomic particles, called protons, neutrons, and electrons. All of the matter in the known universe is made up of a limited number of different atoms. The number of protons in each atom determines its identity as a chemical element. While as many as 118 different... więcej
Salem Press Encyclopedia of Science, 2019. 3p.
