arrangement of elements in the periodic table

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what are all elements in group 0 or 8

unreactive

what do all elements in group 7 do?

very reactive non-metals which react with metals to form salts

I can describe the connection between atomic number and the order of elements in the Periodic Table.

Elements are arranged in order of increasing atomic number.

Elements are arranged in order of increasing atomic number.

Group 1 reactive. Reactivity increases down the group. Group 7 reactive. Reactivity decreases down the group. Group 0 unreactive.

I can describe the change in the number of outer electrons across a period.

The number of outer electrons increases as you go across a period.

I can describe the relationship between the number of outer electrons and group.

The number of outer electrons is the same as the group number.

what are the group 1 elements known as?

alkali metals

what are vertical columns known as?

groups

what are group 7 elements known as?

halogens

what are group group 8 elements known as?

noble gases

what are horizontal rows known as?

periods

Elements with the same number of outer electrons have similar

properties

what do all elements in group 1 do?

react vigorously with water to produce water and an alkaline


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