Intro to Atoms

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

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Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

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A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass

• Electron Shells
• Orbitals
• Electron Cloud
• Nucleus

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"Everything is composed of atoms" was stated by:

• Democritis
• Dalton
• Moseley
• Einstein

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John Dalton stated:

• elements are made of atoms
• atoms of a given element are identical
• atoms cannot be subdivided, created, nor destroyed
• all of the above

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The scientist responsible for "discovering" the nucleus is:

• Bohr
• Rutherford
• Schroedinger
• Einstein

The nucleus of an atom can be described as:

• spacious and negatively charged
• dense and positively charged
• spacious and positively charged
• dense and negatively charged

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How did Rutherford discover the proton?

• Cathode tube ray experiment
• Gold Foil Experiment
• Planetary Model
• Plum Pudding Model

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True or False: The majority of an atom is made up of empty space

• True
• False

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The word "atom" comes from a Greek word that means

• Invisible
• Indivisible
• Undivided