Chemistry1 - Chemistry 0 Element 0 A fundamental form of...

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Chemistry 0. Element 0. A fundamental form of matter that cannot be broken down by ordinary means to a different substance. 1. Each element has unique properties of its own that differ from all other elements. 2. 6 elements compose 98% of an organisms mass. Biologically Important elements 1. Oxygen- O Hydrogen- H 2. Nitrogen- N Carbon- C 3. Phosphorus- P Calcium- Ca 4. Atom 3. Smallest unit of an element that possesses all of its properties. Parts of the Atom Protons 4. Positively charged particles located in the nucleus. Neutrons neutrally charged particles located in the nucleus. Electrons negatively charged particles flying outside the nucleus 5. Nucleus 5. Center region of atom that holds protons and neutrons. Atomic number = number of protons Mass number = Number of protons + number of neutrons 6. The number of electrons will always equal the number of protons in a neutrally charged atom.
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7. The number of neutrons in atoms of the same element may vary 8. Isotope 6. Two atoms of the same element with a different
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