Periodic Trends

Which atom has the largest atomic radius?

• potassium
• rubidium 
• francium
• cesium

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

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.

Order the following in increasing atomic radii: 
Ra, Be, Ca, Rb, H

• Ra, Be, Rb, H, Ca
• Rb, H, Ca, Be, Ra
• Ra, Rb, Ca, Be, H
• H, Be, Ca, Rb, Ra

The distance between the nucleus of an atom and the outer edge of the electron cloud

• Atomic radius
• Ionic Radius
• Ionization Energy
• Electronegativity

Valence electrons are: 

• Electrons in the highest energy level
• Electrons closest to the nucleus
• Electrons that just come and go - they don't stay with the atom
• Electrons that are excited

The tendency of an atom to attract electrons

• electronegativity
• ionization energy
• electron affinity
• reactivity

As atoms of elements in group 16 are considered in order from top to bottom, the electronegativity of each successive element....

• decreases
• increases
• remains the same
• none of the above

Put the following elements in order of decreasing ionization energy:
O, Te, Po, S.

• O, S, Po, Te
• O, S, Te, Po
• O, Te, Po, S
• O, Po, Te, S

Which of the following would require the most energy to remove an electron?

• Sodium
• Potassium
• Rubidium
• Cesium