Unit 3-4 Atoms and the Periodic Table Test Review Updated

Click on the nucleus of the atom

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Click on the cloud of the atom

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Which spot shows where most of the mass is located?

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In which spot MIGHT I find electrons?

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If you change the number of...

• it creates an ion; the once neutral atom gains a charge and is attracted to other ions

• protons

• it creates an isotope; it might be heavier or lighter but it doesn't act all that differently

• electrons

• it creates a different atom; it's the atom's identity

• neutrons

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B and C are found in the ______ of an atom.

• Electron Cloud

• Nucleus

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Match

• Most of the mass

• In the nucleus

• Hardly any mass at all

• Electron cloud

• Most of the volume

• electrons

Match these atom parts

Groups:

(a) Protons (2 answers)

,

(b) Neutrons (2 answers)

,

(c) Electrons (3 answers)

• Negative -

• responsible for bonding (ionic, covalent)

• What makes atoms unique and different (identity)

• get ions if atoms gain (take) or lose some

• Positive +

• Neutral 0

• Isotope if changed (might be radioactive)

Match the following

• Common Name

• 40

• Atomic Number (Protons)

• 40 - 20

• Atomic Mass (protons + neutrons)

• 20

• How to find the number of neutrons

• Ca

• Symbol

• Calcium

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Using your periodic table or the picture, order these elements from the one with the most protons to the one with the least protons

• K

• Fr

• Li