Different forms of the same element are called isotopes. Isotopes have the same number of positive particles, called protons, and negative particles, called electrons, but differing numbers of neutrons. Neutrons are neutral particles residing in the nucleus of an atom along with protons.Know More
All elements on the periodic table have isotopes, although some are artificially created. Heavier elements tend to have more isotopes than lighter elements.
Although the characteristics of isotopes of an element are generally the same, their masses differ. The mass of an atom consists of the number of protons and neutrons. Some isotopes of an element are heavier or lighter than others, depending on how many more or fewer neutrons the isotope has.
Some isotopes are stable, and others are unstable. Isotopes that are unstable break down, or decay, into other elements, giving off radiation in the process. This decay process allows the atom to become more stable.Learn more in Atoms & Molecules
A polyatomic element is a chemical element that naturally exists as a compound molecule containing more than two atoms of the same element joined together by covalent bonds. There are only three polyatomic elements found on the periodic table: selenium, phosphorous and sulfur.Full Answer >
Different forms of the same gene are called alleles. A genetic locus is the spot on the chromosome where alleles for a specific gene can be found. Diploid organisms, including humans, have two alleles at each genetic locus because they inherit one allele from each parent.Full Answer >
Elements that form anions are elements that need to gain electrons to form a complete octet. Elements in the sixth and seventh periods of the periodic table need to gain one or two electrons to have an octet.Full Answer >
Isotopes of the same element differ in the number of neutrons contained within the nucleus of the element's atoms, which causes them to differ in their atomic weights. Some isotopes are more radioactive and unstable than others.Full Answer >