Four: the answer to such questions is always obtainable by summing the subscripts in the formula (remembering that no explicit subscript means one atom per formula unit of the element symbol without a subscript) unless the formula includes parentheses; in that instance, the subscripts within the parentheses must be multiplied by the subscript after the right parenthesis before summing.
Fe2O3 is an iron ore called haematite
There are 3 oxygen atoms and two iron atoms.
Fe2O3 contains two iron(III) cations and three oxide ions.
Chemical formulas represent the number and element of each type of atom in a molecule.
A sodium atom, atomic number 11.
An element is the type of substance it is, for example, oxygen, hydrogen, etc. An atom is the combined particle consisting of electrons spinning around a nucleus, which is made up of protons and neutrons. The number of protons in an atom, not element, determines the type of element it is. If the atom looses a proton, then the element changes to a different one.
By definition, an element is a substance with only one type of atom. So no, each element has its own type of atom.
The protons don't change because if the number of protons changes, the type of element the atom is changes. The number of protons determine the species of the atom.
Chemical formulas represent the number and element of each type of atom in a molecule.
An element is a type of atom; on the periodic table of the elements, they are organized by atomic number (which is the number of protons in the nucleus of this atom).
The number of PROTONS in the NUCLEUS is responsible for the type of the atomic element.
A sodium atom, atomic number 11.
The type of atom is now different from what it was. (It has a new identity.)
The protons of an element determine the atomic number, also known as the proton number. Do not confuse this with mass number which is the number of protons and neutrons.
An element is the type of substance it is, for example, oxygen, hydrogen, etc. An atom is the combined particle consisting of electrons spinning around a nucleus, which is made up of protons and neutrons. The number of protons in an atom, not element, determines the type of element it is. If the atom looses a proton, then the element changes to a different one.
The atomic number is responsible for determining the element.
protons and electrons
Not really. The converse... each element contains one type of atom... isn't exactly true either, unless you're careful about what you mean by "type." Elements are composed of one "type" of atom, where by "type" I mean "having a particular number of protons". They can have different numbers of neutrons and still be the same element, but if the number of protons changes, it's a different element.
There are 9 protons in the element fluorine.
By definition, an element is a substance with only one type of atom. So no, each element has its own type of atom.