Page 36 - DK Children's Encyclopedia
P. 36

Atoms                                                                             SEE ALSO

                                                                                               ▸ ▸ Carbon cycle  p.49
                                                                                               ▸ ▸ Changing states
           Atoms are tiny, round building blocks that build everything                          p.57
           in the universe. They are so small we can’t see them and                            ▸ ▸ Chemistry  p.58
           are mostly made of empty space. Humans, cars, stars, and                            ▸ ▸ Elements  p.90

           everything else around us are all made from tiny atoms.                             ▸ ▸ Solar system
                                                                                                p.233




       Inside an atom?                              Atom                                          The atoms in a
       Atoms are made of even                                                      An oxygen      molecule share
                                                                                                  electrons.
       smaller particles. There are                                                molecule is
       three types of particles                                                    made from two
       inside atoms: protons,                                                      oxygen atoms.
       neutrons, and electrons.



                                                                                                    Oxygen
                    Nucleus                                                                         molecules
                    The center
                    of the atom
                    is called its
                    nucleus.
                                                                                                  Molecules
                                                                                                  Two or more atoms
                                                                                                  stuck together are
                                                                                                  called a molecule.
                                                                                                  Molecules can be long
                                                                                                  chains of atoms, or
                                                                                                  arranged in shapes.


                                                                            Protons

                                                                                                     There are
                                                                                                   7 billion
                                                 Neutron
                                                                                                 atoms in the period
                                                                                                  at the end of this
            Electrons                                                                           sentence—more than
            Electrons circle
            the edges of                                                                          there are people
            every atom.                                                                              on Earth.




          Carbon atoms
          Carbon joins with other atoms
          in molecules to form all living
          things. Carbon atoms can be
          arranged in different ways to
          make different materials.
                                          Diamond                                       Pencil


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