2.2 Patterns in the Periodic Table

The periodic table is arranged according to increasing

• # of protons & neutrons (atomic mass)

• # of protons (atomic number)

• # of neutrons

• # of neutrons and electrons

Elements in the same group (column) 

• have the same number of energy levels.
• are either all metals or nonmetals.
• have the same atomic mass.
• have the same number of outer electrons in the outer energy level.

Elements to the right of the zigzag line are

• nonmetals
• metals
• solids
• reactive

Elements to the left of the zigzag line are

• liquids
• nonmetals
• nonreactive
• metals

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.HS-PS1-1

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Atomic radius generally increases as we move __________.  

• down a group and from right to left across a period 
• up a group and from left to right across a period 
• down a group and from left to right across a period 
• up a group and from right to left across a period 

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NGSS.HS-PS1-1

Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.

• decreases, increases 
• increases, increases
• increases, decreases 
• stays the same, increases

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NGSS.HS-PS1-1

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Which element has a full valence shell?

• F
• D
• C
• E

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As you move down the periodic table atoms get bigger.  This is because ____________.

• The atoms have more mass.
• The atoms have more protons.
• The atoms have more energy levels
• The atoms have more neutrons

Electronegativity is...

• the ability of an atom to attract/ accept electrons
• the ability of an atom to lose electrons
• the energy required to remove an electron from a specific atom
• how easy it is to make friends. 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2