Answer:

Explanation:

Atoms—and the protons, neutrons, and electrons that compose them—are extremely small. For example, a carbon atom weighs less than 2 × 10−23 g, and an electron … The amu was originally defined based on hydrogen, the lightest element, … but three-letter symbols have been used to describe some elements that have …

Protons: Protons are positively charged particles that are also found in the nucleus. Like neutrons, protons give mass to the atom but do not participate in … 3) Electrons: Electrons are negatively charged particles that are found in … pair of electrons with 4 different hydrogen atoms, forming a molecule of CH4 (methane).Elements differ from each other in the number of protons they have, e.g. … Atoms of an element that have differing numbers of neutrons (but a constant atomic … Electrons, because they move so fast (approximately at the speed of light), …toms are made up of particles called protons, neutrons, and electrons, which … Therefore, they do not contribute much to an element’s overall atomic mass. … For instance, iron, Fe, can exist in its neutral state, or in the +2 and +3 ionic states. … Isotopes of the same element will have the same atomic number but different …