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A molecule. You can have ionic or covalently bound atoms in a molecule. An example of ionic is NaCl, and of covalent is CO2
Fermion
A bond in which there is an equal sharing of electrons between atoms is called a nonpolar covalent bond.
A) Molecule "for plato users"
a.molecule
atom is the smallest possible substance similar atoms make up the molecule ex. o2, c different molecules join together make up a compound ex. co2
Covalently bound atoms are held together by the sharing of electrons between the corresponding atoms.
Star matter exists in the heightened state of plasma, a superheated state of matter in which electrons are not bound to the atoms as they usually would be.
Atoms Answer 2 question is
A chemical combination of two or more elements is called a compound. The simplest unit of a compound is called a molecule (if the atoms are covalently bound) or a formula unit (if the atoms are joined by ionic bonds)
Two or more atoms of different elements can form a bound state where they are bonded one with the other. The resulting complex is called a molecule and has chemical and physical properties completely different from the constituting atoms. An example is water, whose molecule is formed by two hydrogen and one oxygen atoms bonded via the so called covalent bond, that forms when different atoms put an electron in common. Water, liquid at room conditions, has completely different properties from both oxygen and hydrogen, both gasses at room conditions.
An atom is a structure of protons, neutrons and electrons. A collection of atoms that all share the same number of protons are all given the same element name (i.e. all carbon atoms have exactly 6 protons, and all helium atoms have 2). a compound is a collection of atoms of different elements that are bonded together. A good example of this is water, which is made of two Hydrogen atoms and one Oxygen atom bound together.