Inv2/Exp3/Periodic Trends in Atomic Size

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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NGSS.HS-PS1-1

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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NGSS.HS-PS1-1

Which atom has the largest atomic radius?

• potassium
• rubidium 
• francium
• cesium

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NGSS.HS-PS1-1

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

• Ar
• He
• Kr
• Rn

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NGSS.HS-PS1-1

Which periodic group has the smallest atomic radius?

• Alkali metals
• Halogens
• Noble Gases
• Transition metals

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NGSS.HS-PS1-1

Atomic size generally increases as we move __________.

• down a group and from right to left across a period

• up a group and from left to right across a period

• down a group and from left to right across a period

• up a group and from right to left across a period

As you move from left to right on the periodic table, the number of valence electrons.......

• Increases

• Decreases

• Remains the same

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

As you move down a group on the periodic table, the number of valence electrons....

• Increases

• Decreases

• Remains the same

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What makes a valence electron less attracted to the nucleus?

• less distance between the nucleus and having less protons

• less distance between the nucleus and having more protons

• more distance between the nucleus and having less protons

• more distance between the nucleus and having more protons

Tags

NGSS.HS-PS1-1

The period that an element is in on the periodic table, tells you what?

• Number of protons

• Number of electrons

• Number of valence electrons

• Number of energy levels