Ionic Radius

What is another word for ionic size?

• Ionic measurement

• atomic size

• atomic radius

• ionic radius

Why are cations larger and anions smaller than their respective atoms?

• Cations are larger than their respective atoms because of decreased electron repulsion
• Cations are larger than their respective atoms because of increased electron repulsion
• Anions are smaller than their respective atoms because of increased effective nuclear charge

List the ions from smallest to largest Se^2-, Zr⁴⁺, Mg, Rb⁺, Br^-, K⁺

• Se^2-, Zr⁴⁺, Mg, Rb⁺, Br^-, K⁺

• Mg, Rb⁺, Br^-, Se^2-, Zr⁴⁺, K⁺

• K⁺, Br^-, Se^2-, Zr⁴⁺, Mg, Rb⁺,

• Zr⁴⁺, K⁺, Rb⁺, Mg, Br^-, Se^2-

Tags

NGSS.HS-PS1-1

The ionic radius of a cation decreases when the effective nuclear charge on an ion...

• Decreases

• Increases

• Remains same

• None of the above

Size of ionic radius of anion as compared to atomic radius of anion is

• smaller
  
• same
  
• none
  
• greater
  

Why does ionization energy decrease as you go down a group?

• the atom becomes smaller and the so the electrons in outer shells are closer to the center.
• the atom becomes bigger, so the electrons in the outer shell are further apart from the center.
• the atom becomes smaller, so the electrons in the outer shells are further apart from the center.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of these statements correctly represents the trend in relation to the ionic size of elements as we move down a column in the periodic table?

• Whether positive or negative ion, the ionic size increases as we move down a column
• Ionic size first decreases and then increases as we move down a column.
• Whether a positive or negative ion, the ionic size decreases as we move down a column.
• Ionic size first increases and then decreases as we move down a column.

Which of the following statements about shielding is most accurate?

• Valence electrons shield other valence electrons from nuclear charge
•  Core electrons shield other core electrons from nuclear charge
•  Valence electrons shield core electrons from nuclear charge
•  Core electrons shield valence electrons from nuclear charge

As you look from left to right across a period, ionic radius

• increases

• decreases

As you look down a group, ionic radius

• increases

• decreases