Element is a group of atom. It is purest form of substance.
Elements
An oxide always has at least one oxygen atom as well as at least one atom of a different element.
By definition, an asymmetric carbon atom is one that is bonded to four different types of atoms or groups, hence, only one can be a hydrogen atom. If there were two hydrogen atoms you would not have four different kinds of atoms.
One molecule of Au(OH)₃ contains a total of four atoms. It has one gold (Au) atom and three hydroxide (OH) groups, each consisting of one oxygen (O) atom and one hydrogen (H) atom. Therefore, the breakdown is one Au atom, three O atoms, and three H atoms, summing up to four atoms in total.
One molecule of NCl3 consists of one nitrogen atom and three chlorine atoms, totaling four atoms in total.
Phosphorus trichloride (PCl3) has one phosphorus atom bonded to three chlorine atoms, resulting in three bonding groups.
There are four atoms in one of these molecules.
One atom of water and two atoms of hydrogen. One oxygen atom and two hyrdogen atoms.
five One calcium atom, one carbon atom, and three oxygen atoms.
Milk of magnesia, chemically known as magnesium hydroxide, has the formula Mg(OH)₂. In one molecule of magnesium hydroxide, there are three atoms: one magnesium (Mg) atom and two hydroxide (OH) groups, each consisting of one oxygen (O) atom and one hydrogen (H) atom. Therefore, the total number of atoms in one molecule of milk of magnesia is five: one magnesium, two oxygen, and two hydrogen atoms.
Two fluorine atoms one chlorine atom and one phosphorus atom make up PClF2.
The chemical formula (CO) tells you - one atom of Carbon (C) and one atom of Oxygen (O) = 2 atoms.