Elements and atoms
Terms
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- Matter
- anything that occupies space and has mass
- chemical symbol
- names of elements are commonly identified by thier
- carbon, hydrogen, oxygen, nitrogen
- 4 elements that make up 96% of the bodys weight
- nucleus and shells
- The two basic regions of structural organization of the atom
- protons and neutrons (except an atom of hydrogen
- The nucleus contains the atom's
- electrons (except an atom of hydrogen (H) which only has one electron)
- The shells contain
- p+
- The symbol and charge of a proton is
- protons
- In the naturally occurring elements, the number of electrons is equal to the number of
- n0
- The symbol and charge of a neutron is
- 13
- The mass number of an atom (carbon) that has six protons and seven neutrons is
- isotopes
- Atoms of the same element that have different numbers of neutrons are called
- e-
- The symbol and charge of an electron is
- zero
- The charge of naturally occurring elements is
- O-2
- An oxygen atom that has gained two electrons is written as
- Na+
- A sodium atom that has lost one electron is written as