Atoms and elements are related in that elements consist of one specific kind of atom. This means that the atom is the base unit of an element. Atoms consists of a nucleus, which contains protons, neutrons and electrons that orbit around the nucleus.Know More
Hydrogen is an element composed of atoms that have one proton and one electron. However, different isotopes of hydrogen have varying numbers of neutrons.
Different elements have different numbers of protons, which determines an element's atomic number. On the periodic table, the atomic number identifies the specific element and how many protons are in its nucleus. For example, carbon has six protons, so its atomic number is 6.
When two or more elements react chemically, they form a substance called a compound. Some examples of compounds are calcium carbonate (CaCO3) and sodium chloride (NaCl).Learn more about Atoms & Molecules
A molecule is polar if it contains atoms of differing electronegativities arranged asymmetrically around a central atom. This causes an overall partial negative charge on one end of the molecule and an overall partial positive charge on the other end.Full Answer >
The strong nuclear force, one of the four fundamental universal forces, is responsible for holding atoms together. Without it, the nucleus, consisting of positive protons and neutral neutrons, would have nothing to stop the like charges of neighboring protons (positive/positive) from repelling one another.Full Answer >
The difference between atoms, ions and isotopes is the number of subatomic particles. An atom is the basic building block of matter, the smallest molecule of an element that exists and that cannot be chemically divided by ordinary means. Each atom is comprised of protons, neutrons and electrons. In ions, the number of electrons differs, and in isotopes, the number of neutrons varies.Full Answer >
John Dalton's theory regarding atomic theory, published in 1808, incorrectly stated that atoms were the indivisible components of matter. This was later shown to be incorrect when the existence of electrons, protons and neutrons was demonstrated. Dalton was, however, correct in stating that the atom is the smallest particle that is involved in a chemical reaction.Full Answer >