Periodic Trends Reactivity

As you move down a group on the periodic table atomic radius gets bigger. This is because ____________.

• the atoms have more protons.

• the atoms have more electron shells & higher energy levels.

• the atoms have more neutrons.

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As you move from left to right across a period on the periodic table atoms tend to get smaller because, ______________.

• the atoms have more mass.

• the atoms have less mass.

• the atoms have more protons.

• the atoms have less electrons.

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The atom with the largest atomic radius in Group 18 is - 

• Ar
• He
• Kr
• Rn

Elements with similar properties will likely be in the same

• period

• group

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Metals react by

• Losing electrons

• Gaining electrons

Which element has the largest atomic radius?

• Lithium

• Sodium

• Magnesium

• Caesium

As we move down a group of metals, the reactivity of the element

• increases

• decrease

• does not change

The most reactive nonmetals are found

• at the top of the periodic table.

• at the bottom of the periodic table.

The most reactive Alkaline Earth Metal is

• Magnesium (Mg)

• Beryllium (Be)

•  Barium (Ba)

• Calcium (Ca)

The most reactive halogen is

• Astatine (At)

• Bromine (Br)

• Chlorine (Cl)

• Fluorine (F)