Chemistry- the modern periodic table (year 9) Flashcards

1
Q

How many elements are there?

A

over 100

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2
Q

How is the periodic table set out?

A

In order of increasing atomic number

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3
Q

where are metals and non metals found?

A

metals are found to the left and non metals are found to the right

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4
Q

What do elements with similar properties do?

A

they form columns

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5
Q

What are the vertical columns called?

A

groups

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6
Q

What does the group number tell you?

A

how many electrons there are in the outer shell

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7
Q

What can you make predictions about?

A

trends in reactivity the properties of different elements when you know one of them

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8
Q

What happens in group 1 elements?

A

the elements react more vigorously as you go down the group

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9
Q

What happens in the group 7 elements?

A

the reactivity decreases as you go down the group

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10
Q

What are the rows called?

A

periods. Each new period represents another full shell of electrons

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