Unit 2 Trends

The concept of shielding happens because of

• attraction between nucleus and valence electrons
• attraction between nucleus and core electrons
• repulsion between valence electrons and other valence electrons
• repulsion between core electrons and valence electrons

Electronegativity is...

• how much an atom wants electrons in a bond

• the ability of an atom to lose electrons

• the energy required to remove an electron from a specific atom

• how easy it is to make friends.

Tags

NGSS.HS-PS1-2

Which of the following correctly places the elements of Group 7 in order of INCREASING electronegativity?

• F, Cl, Br, I

• Cl, F, Br, I

• I, Br, Cl, F

• Br, Cl, I, F

As you move DOWN a group, there are _______ electrons and energy levels leading to a greater shielding effect and a ________ electronegativity value.

• more, higher

• more, lower

• less, higher

• less, lower

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following has the HIGHEST electronegativity value?

• calcium

• arsenic

• nitrogen

• neon

Put the following in order of increasing ionization energy:Neon, Lithium, Carbon

• Lithium, Carbon, Neon
• Carbon, Lithium, Neon
• Neon, Carbon, Lithium
• Lithium, Neon, Carbon

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

When you move left across the table, the radius ____. When you move down the table, the radius ____.

• Increases, Decreases

• Decreases, Increases

• Increases, Increases

• Decreases, Decreases

Which of the following sequences corresponds to a correct trend in ionization energy?

• Cl > S > P > Al
• Sr > Ca > Mg > Be
• Rb > K > Na > Li
• Rb > Sr > I > Xe

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Ionization energy is...

• the energy required to add an electron to a specific atom
• how much energy it takes to remove an electron from an atom
• the energy required to shield the outer electrons from the nucleus
• a measure of the ability of an atom to attract electrons

Tags

NGSS.HS-PS1-2

Which of the following will have a larger radius than Zinc?

• Gallium
• Aluminum
• Magnesium
• Strontium