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Many atoms become stable when their valence shell is filled with electrons or when they satisfy the octet rule (by having eight valence electrons). An atom stabilizes by bonding with another atom in order to fill out its outer set of electrons in its shell.
The elements in compounds are held together by chemical bonds. A chemical bond is a force of attraction between atoms or ions that share or transfer valence electrons. Water is an example of a common chemical compound.
Although there are elements we have not yet created or found in nature, scientists already know what they will be and can predict their properties. Its location and properties can be predicted because the periodic table organizes elements according to increasing atomic number. …
Note that an element: consists of only one kind of atom, cannot be broken down into a simpler type of matter by either physical or chemical means, and. can exist as either atoms (e.g. argon) or molecules (e.g., nitrogen).
Above hassium (108), only copernicium (112), nihonium and flerovium (114) have known chemical properties, and copernicium is the only one that has been conclusively categorised. The rest remain elements with unknown chemical properties, for now.
This list contains the 118 elements of chemistry.
Almost 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium. All 11 are necessary for life.
It is thus no wonder that 99% of the atoms in the human body come from six elements: Hydrogen (62.9%), oxygen (almost 24%), carbon (nearly 12%), nitrogen (nearly 0.6%), calcium (0.24%) and phosphorus (0.14%). Calcium is on the list as it is essential for our skeleton, which contains 99% of the calcium in our body.
The human body, just like the entire universe, is made up of the five elements earth, water, fire, air and space.