We Are All Made of Molecules by Susin NielsenThirteen-year-old Stewart is academically brilliant but socially clueless.
Fourteen-year-old Ashley is the undisputed “It” girl in her class, but her grades stink.
Their worlds are about to collide when Stewart and his dad move in with Ashley and her mom. Stewart is trying to be 89.9 percent happy about it, but Ashley is 110 percent horrified. She already has to hide the real reason her dad moved out; “Spewart” could further threaten her position at the top of the social ladder.
They are complete opposites. And yet, they have one thing in common: they—like everyone else—are made of molecules.
A molecule is formed when two or more atoms join together chemically. A compound is a molecule that contains at least two different elements. All compounds are molecules but not all molecules are compounds. Molecular hydrogen H2 , molecular oxygen O2 and molecular nitrogen N2 are not compounds because each is composed of a single element. The smallest bit of each of these substances would be referred to as a molecule.
For a more advanced list of resources on atoms, elements and compounds. Elements are substances that cannot be separated into simpler substances. Salt is made up of the elements sodium and chloride. Water is made up of the elements hydrogen and oxygen. The smallest particles of matter are called atoms.
Most of the Universe consists of matter and energy. Energy is the capacity to do work. Matter has mass and occupies space. All matter is composed of basic elements that cannot be broken down to substances with different chemical or physical properties. Elements are substances consisting of one type of atom , for example Carbon atoms make up diamond, and also graphite.
A compound is a molecule that contains at least two different elements. All compounds are molecules but not all molecules are compounds.
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Ions and compounds
A molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms. The atoms of certain elements readily bond with other atoms to form molecules. Examples of such elements are oxygen and chlorine. The atoms of some elements do not easily bond with other atoms. Examples are neon and argon.
Molecule , a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance. The division of a sample of a substance into progressively smaller parts produces no change in either its composition or its chemical properties until parts consisting of single molecules are reached. Further subdivision of the substance leads to still smaller parts that usually differ from the original substance in composition and always differ from it in chemical properties. In this latter stage of fragmentation the chemical bonds that hold the atoms together in the molecule are broken. Atoms consist of a single nucleus with a positive charge surrounded by a cloud of negatively charged electrons. When atoms approach one another closely, the electron clouds interact with each other and with the nuclei. If this interaction is such that the total energy of the system is lowered, then the atoms bond together to form a molecule.
Molecule is the general term used to describe any atoms that are connected by chemical bonds. Every combination of atoms is a molecule. A compound is a molecule made of atoms from different elements. All compounds are molecules, but not all molecules are compounds. Hydrogen gas H 2 is a molecule, but not a compound because it is made of only one element.