Ch. 4-1: Lewis & Bohr Structures

How are electrons arranged in an atom?

• In groups of five
• In energy levels
• By color
• By shape

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NGSS.HS-PS1-1

An element with five valence electrons is

• phosphorus

• oxygen

• beryllium

• rubidium

What is the name of the group that never reacts--ever ever they are stable with a full outermost ring!!!

• noble gases
• transition
• halogens
• borons

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

What's a valence electron?

• electrons in the second energy level
• electrons in the outermost energy level
• the atomic number
• electrons in the first level

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NGSS.MS-PS1-1

How many valence electrons does Iodine Have?

• 6

• 16

• 7

• 17

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NGSS.HS-PS1-1

How many electrons should Flourine have around its Lewis dot model?

• 5
• 6
• 7
• 8

How many electrons should Carbon have around its Lewis dot model?

• 1
• 3
• 4
• 5

?

• Helium
• Hydrogen
• Argon
• Silver

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NGSS.MS-PS1-1

How many electrons does potassium K contain? (click to see image)

• 19
• 39
• 20
• 40

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NGSS.MS-PS1-1

Electrons exist in something called __________.

• nucleus

• orbits

• Shells or Energy levels

• Valences