C2: The Periodic Table Flashcards

1
Q

How did John dalton arrange the elements?

A

In order of their atomic weights

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2
Q

What did Mendeleev do?

A

He arranged the elements so that a regularly occurring pattern in their properties could be seen

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3
Q

Why did Mendeleev leave gaps in the periodic table?

A

For elements that should exist, but hadnt been discovered yet

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4
Q

What is group 0 also known as?

A

The noble gases

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5
Q

What is group 1 also known as?

A

The alkali metals

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6
Q

What happens to the reactivity as you go down group 1?

A

Increases

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7
Q

What happens to the melting and boiling points as you go down group 1?

A

Decreases

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8
Q

What is group 7 also known as?

A

The halogens

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9
Q

What happens to the melting and boiling points as you go down group 7?

A

Increase

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10
Q

What happens to the reactivity as you go down group 7?

A

Decreases

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11
Q

What is a displacement reaction?

A

A more reactive element will displace a less reactive element

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12
Q

What are 4 properties of the transition metals?

A

Good conductors, hard and strong, dense and high melting points

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