Polar covalent. A force called the strong force opposes and overcomes the force of repulsion between the protons and holds the nucleus together. plus if there are more water molecules then you can just do the math. Oxygen is the chemical element with the symbol O and atomic number 8. If an atom has an unpaired electron it's a radical. Oxygen on its own can exist, it's called a radical. With two bonding pairs and two lone pairs, the oxygen atom has now completed its octet. A molecule with a single phosphorus atom and three fluorine atoms is called phosphorus trifluoride. Moreover, by sharing a bonding pair with oxygen, each hydrogen atom now has a full valence shell of two electrons. Oxygen atoms make up almost a quarter of the air on Earth, and they’re necessary for all animals (including people) to breathe. These are called as diatomic elements as … Chemists usually indicate a bonding pair by a single line, as shown (below). One atom of Carbon combines, with two atoms of Oxygen, to form C O 2. A single oxygen, O, is not a molecule. ... What is the total number of covalent bonds normally associated with a single carbon atom is a compound. Single atoms of elements are not molecules. Carbon combines with Oxygen, to form Carbon dioxide. Bromine atom is available In two isotopes, 3 5 7 9 B r (49.7 %) and 3 5 8 1 B r (50.3 %) the average atomic mass of bromine atom is : View Answer Total mass of neutrons in 7 mg of 1 4 C is : This bond of sharing, one electron is called, a covalent bond. Atoms contain three sub-atomic particles called protons, neutrons and electrons. Oxygen as O2 has 6 electrons in each outer shell, it wants to have 8 in each outer shell so forms 2 covalent bonds, so 2 electron pairs are shared. When oxygen bonds to itself (e.g., O 2, O 3) or to another element (e.g., carbon dioxide or CO 2), molecules are formed. Some oxygen atoms combine with carbon atoms to make carbon dioxide, which plants breathe.Other oxygen atoms combine with two hydrogen atoms to make water molecules.Oxygen atoms also react with hydrocarbon molecules or some metals, like magnesium, to … It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds.After hydrogen and helium, oxygen is the third-most abundant element in the universe by mass. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a. The protons and neutrons are found in the nucleus at the centre of the atom. 4. So in one molecule, there is a total of 3 atoms. According to the rules, the proper name here is diselenium dibromide. There are two atoms of each element, selenium and bromine. So what makes the protons stay together in an atom? 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