Periodic Trends (AR and IE)

The atom with the largest atomic radius is

• Sodium

• Strontium

• Bromine

• Bismuth

Which sequence of elements is arranged in order of decreasing atomic radii?

• Al, Si, P

• Li, Na, K

• Cl, Br, I

• N, C, B

The amount of energy required to remove the outermost electron from a gaseous atom in the ground state is known as

• activation energy

• first ionization energy

• electron affinity

• electronegativity

Which of the following is true for alkaline earth metals as their atomic number increases?

• The atomic radius decreases.
• Ionization energy decreases.
• The number of valence electrons increases.
• The Coulombic attraction increases.

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

Which element has the greater ionization energy?

• Strontium
• Boron

Which element has the greater ionization energy?

• Lead
• Silicon

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

The atom with the largest atomic radius in Group 18 is - 

• Ar
• He
• Kr
• Rn