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Atom : A single unit of an element

Explore the fundamentals of chemistry, including the characteristics of matter, elements, and compounds. Learn about atoms, subatomic particles, and the structure of the nucleus. Discover how elements make up living organisms and the concept of chemical compounds.

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Atom : A single unit of an element

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  1. Chemistry: The science that investigates the characteristics and properties of matter, including the changes that matter undergoes.

  2. Matter: Anything that has a mass and takes up spaceAll matter is made up of the elements found on the periodic table- elements cannot be broken down into simpler substances

  3. Atom: A single unit of an element

  4. Atoms are made up of SUBATOMIC PARTICLES • PROTONS • NEUTRONS • ELECTRONS

  5. ELECTRON CLOUD: describes the POSSIBLE LOCATIONS of electrons around the nucleus.

  6. Nucleus: Central Core of the Atom- it is made up of the protons and neutrons

  7. PROTONS: • p+ • POSITIVELY charged (+1) • Found INSIDE the NUCLEUS • Same mass of 1 neutron

  8. NEUTRONS: • n • NO electric CHARGE (0) • Found INSIDE the NUCLEUS • Same mass of 1 proton

  9. ELECTRONS: • e- • NEGATIVELY charged (-1) • Found OUTSIDE the NUCLEUS • The mass of 1,836 electrons equals the mass of 1 proton

  10. ATOMIC NUMBER: the number of protons in one atom. This different for every element.

  11. Elements of Life • 26 Elements found in living organisms, 6 of these elements (CHNOPS) make up 96% of the weight of living things

  12. Compounds: A substance that contains two or more chemically combined elements Example:H2O How many atoms of each element? • Hydrogen _________ • Oxygen___________ • NaCl • Sodium_________ • Chlorine__________

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