A sentence with the word molecule4/5/2023 And some molecules do have an electrical charge. Some people count these single atoms as molecules too. But some atoms - such as helium - don’t have any electrical charge, even by themselves. Put together, the atoms in most molecules have a neutral electrical charge - neither positive nor negative. Take apart a DNA molecule and it will not be able to do what DNA does - provide the instructions cells need to survive. That one molecule of DNA is made from many smaller molecules, including sugars and phosphates. A single strand of DNA, for instance, is one large molecule. Smaller molecules can join together to make up large ones. But split it apart into its atoms, and it will not be water anymore. For example, a single molecule of water - H 2O - has all the properties of water. A molecule is the smallest particle of a substance that still has all the chemical properties of that substance. Molecules make up your own body, the air we breathe, everything living around us. A molecule of water - H 2O - is made of two hydrogen atoms bonded to one oxygen atom. Other molecules are heteronuclear - made of more than one element. The oxygen we breathe, for example, is a molecule of two oxygen atoms - O 2. That means they contain atoms of only one element. A molecule is usually two or more atoms held together with chemical bonds.
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