Quiz - Unit 5 Periodic Trends

Potassium makes a good substitute for Sodium when making gorilla glass because ________________________.

• It has a bigger atomic radius and puts the glass into compression
• It has a smaller atomic radius and puts the glass in tension
• It has a lower ionization energy, so it is not likely to react.
• It has a lower electron affinity, so it is not likely to react

How would you classify this element: a shiny, solid (at room temp), that is malleable?

• Metal
• Non metal
• Metalloid

How would you classify this element: a shiny, solid (at room temp), that is brittle?

• Metal
• Non metal
• Metalloid

As you move from left to right on the periodic table, the atomic radius _____________.

• increases
• decreases

As you move from top to bottom on the periodic table, the atomic radius _____________.

• increases
• decreases

Which has a larger atomic radius?

• Li
• F
• Cs
• Rd

Compare the sizes of the the following ions (Cl- and K+) and select the statement that is correct.

• Both of these have the same radius because they both have 18 electrons
• The K+ ion has a smaller radius because it has more protons and has lost a shell
• The Cl- ion has a smaller radius because it has fewer protons
• The K+ ion has a larger ionic radius because it has more electrons.

What happens to the radius of the Na atom as it forms an ion?

• It gets smaller because it loses an electron
• It gets bigger because it gains an electron
• Nothing, it stay the same

What is ionization energy?

• The energy required for a neutral atom to lose electrons
• The energy required for a neutral atom to gain electrons
• The energy require to split an atom

Which one of the following has the highest ionization energy?

• Na
• Mg
• K
• Ca