Atomic Trends

Atoms of elements in the same group of the periodic table share the same

• number of energy levels

• atomic numbers

• number of valence electrons

• atomic masses

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NGSS.HS-PS1-1

The farther an electron is from the nucleus, the more it has.

• charge

• energy

• mass

• pull

The total number of electrons in the outer shell of a sodium atom is

• 1

• 2

• 8

• 11

Tags

NGSS.HS-PS1-1

Which of the following elements would be the least reactive?

• Iodine

• Silicon

• Silver

• Argon

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Indicate whether the following properties increases or decreases from left to right across the periodic table.

Atomic Radius(excluding noble gases)

• Increases

• Decreases

Tags

NGSS.HS-PS1-2

Analyze the factors that contribute to the increase in atomic radius as you move down a group.

• Increased nuclear charge and decreased shielding

• Increased number of electron shells and increased shielding

• Decreased nuclear charge and increased electron affinity

• Decreased number of electron shells and decreased shielding

The atomic radius gets ​​ (a)   as you go down a group in the periodic table. This is caused by the addition of​​ ​ (b)   outweighs the nucleus' force of ​ ​​ (c)   ​​

• larger

• energy levels

• attraction

• remains the same

• smaller

Tags

NGSS.HS-PS1-1

Predict the element with the smallest atomic radius in the third period.

• Sodium (Na)

• Magnesium (Mg)

• Aluminum (Al)

• Chlorine (Cl)

Tags

NGSS.HS-PS1-1

Explain why the ionization energy decreases as you move down a group in the periodic table.

• Due to increased atomic radius and increased shielding effect

• Due to decreased atomic radius and decreased shielding effect

• Due to increased nuclear charge

• Due to decreased electron affinity

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following elements has the highest ionization energy?

• Lithium (Li)

• Beryllium (Be)

• Boron (B)

• Carbon (C)

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DOK Level 2: Skill/Concept