Notes atoms
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Notes: Atoms PowerPoint PPT Presentation


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Notes: Atoms. Atoms are the smallest particles of an element. Every atom is made of three parts: Protons – Positive charge Neutrons – No charge (neutral) Electrons – Negative charge. Protons and neutrons are found in the nucleus of an atom and both have an atomic mass of 1

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Notes: Atoms

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Notes atoms

Notes: Atoms


Notes atoms

  • Atoms are the smallest particles of an element.

  • Every atom is made of three parts:

    • Protons – Positive charge

    • Neutrons – No charge (neutral)

    • Electrons – Negative charge


Notes atoms

  • Protons and neutrons are found in the nucleus of an atom and both have an atomic mass of 1

  • Electrons are found on shells outside the nucleus – they are very small


Notes atoms

  • Atomic number – the number of protons in the nucleus

  • Every atom of a particular element contains the same number of protons

  • Atomic mass – the number of protons plus the number of neutrons


Dalton s atomic theory

Dalton’s Atomic Theory

  • Atoms can’t be broken down into smaller pieces

  • In any element, all the atoms are exactly alike

  • Atoms of two of more elements can combine to form compounds


Notes atoms

  • Atoms of each element have a unique mass

  • The masses of the elements in a compound are always in constant ratio


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