Part C Physical Science EOC Review

The properties of a compound are usually ________________ the properties of the elements making up the compound.

• the same as

• different from

• greater

• less than

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How many atoms are in the compound Mg(NO3)2?

• 8

• 9

• 10

• 11

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When an atom gains or loses electrons, the charged particle that results is called a(n) __________.

• neutron
• proton
• quark
• ion

What does a chemical formula not show?

• names
• chemical symbols
• atoms of elements
• elements

Are the atoms more stable when they are bonded together or when they are apart? 

• Bonded Together
• Apart

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What is the number of valence electrons for Oxygen (page 554)?

• 8

• 6

• 2

• 1

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What is the number of valence electrons for Silicon (p 554)?

• 1

• 2

• 6

• 4

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How many valence electrons in this structure?

• 6
• 5
• 4
• 7

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Why do atoms form chemical bonds?

• Because they are less stable as compounds

• They can fill their valence (outer) level with electrons through chemical bonds.

• Because they require more protons

• Because they want to be James Bond

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Helium only has 2 electrons on it's electron dot diagram. Why is it in the Noble Gas group?

• Because it has 2 protons

• Because it's atomic number is 2

• Because its valence (outer) level is full with 2 electrons

• Because it is a prince

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