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 half-life refers to the time required for half of the measured atoms in a sample to go through radioactive or nuclear decay. The half-life of a specific isotope is constant, regardless of the initial quantity of atoms present or the amount of time it is sitting around.Full Answer >
The polarity of a bond is determined by the electronegativity of the atoms bonded. If the difference between the electronegativity values for both atoms is small enough to prevent an ionic bond but large enough to be significantly different, a polar covalent bond is formed.Full Answer >
No, not all atoms of the same element are identical. Contrary to Dalton’s theory — that atoms of the same element are identical — scientists discovered that atoms comprise smaller sub-atomic particles. Further experiments revealed fundamental particles beyond neutrons, protons and electrons. Although an atom is the tiniest particle of an element that retains the element’s intrinsic properties, all 92 stable atoms are composed of only three smaller, more fundamental particles.Full Answer >
Covalent bonds form when atoms share their valence electrons with other atoms to become a more stable molecule. Atoms share their electrons in order to completely fill up their outer-most layer — the valence shell. Two atoms that are covalently bonded have less energy than the individual atoms, making the bonded atoms more stable.Full Answer >