ATOMIC RADIUS

As you move across 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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As you move down the periodic table atoms get bigger.  This is because ____________.

• The atoms have more mass.
• The atoms have more protons.
• The atoms have more energy levels
• The atoms have more nuetrons

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Which atom has the largest atomic radius?

• potassium

• rubidium

• francium

• cesium

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

• Ar
• He
• Kr
• Rn

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Which statement correctly and completely identifies a trend?

• Atomic radius decreases across a period and increases down a group.

• Electronegativity decreases across a period and decreases down a group.

• Ionization energy increases across a period and increases down a group.

• Ionic radius increases across a period and increases down a group.

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Which one has the largest radius?

• Lithium (Li, atomic #3)
• Boron (B, atomic #5)
• Neon (Ne, atomic #10)
• Nitrogen (N, atomic #7)

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What is an "Atomic Radius"?

• The diameter of an atom
• Half the diameter of an atom
• The weight of an atom
• The mass of an atom

What is the atomic radius?

• The distance from the nucleus to the outer boundary of an atom

• The distance from one side of an atom to the other side

• The distance around the atom

• The distance between atoms in the gas phase

• The distance between atoms in the solid phase

Which of the following elements would be smaller: indium or gallium?

• indium

• gallium

• both atoms are the same size

• cannot be determined

• the sizes can vary

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NGSS.HS-PS1-1

Which of the following elements would be the largest: copper, zinc, silver or cadmium?

• copper

• zinc

• silver

• cadmium

• cannot be determined

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