11. periodic table Flashcards

1
Q

What is same about elements in the same period? (across)

A

They have the same amount of valence shells

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2
Q

What is same about elements in the same group? (down)

A

They have the same valence electrons

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3
Q

What is the 1 character as elements goes across the period?

A

Frome metallic to non-metallic

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4
Q

chemical property of alkali metals

A
  1. Reactivity increases down the group
  2. Most reactive: violently, explosive
    Least reactive: quickly, floats on water.
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5
Q

What is the name of group 17 elements?

A

Halogen

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6
Q

Does reactivity increase or decreases down the group 17?

A

decreases

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7
Q

How does displacement reaction happen?

A

When the halogen is more reactive than the halide, which causes displacement

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8
Q

list the colors of
Florine, Chlorine, Bromine, Iodine

A
  1. pale yellow
  2. greenish yellow
    3.reddish brown
  3. black
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9
Q

Why are noble gases less reactive?

A

As they have full valence electron shell

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