Copper and iron mostly.
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Copper is the main element of high quality plumbing.
Inexpensive plumbing used in tract homes is generally iron.
Inexpensive plumbing used in businesses is generally PVC (polyvinylchloride, a type of plastic).
There was a time when led was the preferred choice for the construction of water pipes. Nowadays, elements that are used for water pipes include iron, steel, and copper.
isotopes of a given element differ in the number of neutrons they have.
The atomic number of an element is equivalent to the number of protons in the nucleus of an atom of that element. It determines the element's identity and its place on the periodic table.
Atoms of a given element always have the same number of protons in their nucleus. Neutrons can vary (in different isotopes) and electrons can vary (in different ions) but protons are always the same for a given element. If the number of protons is changed, then you no longer have the same element.
daltons atomic postulations stated that: * Elements are made of tiny particles called atoms. * All atoms of a given element are identical. * The atoms of a given element are different from those of any other element; the atoms of different elements can be distinguished from one another by their respective relative weights. * Atoms of one element can combine with atoms of other elements to form chemical compounds; a given compound always has the same relative numbers of types of atoms. * Atoms cannot be created, divided into smaller particles, nor destroyed in the chemical process; a chemical reaction simply changes the way atoms are grouped together.
no