Periodic Trends

Which periodic group has the smallest atomic radius?

• Alkali metals
• Halogens
• Noble Gases
• Transition metals

Which statement correctly and completely identifies a trend?

• Atomic radius decreases across a period and increases down a group.
• Electronegativity decreases across a period and decreases down a group.
• Ionization energy increases across a period and increases down a group.
• Ionic radius increases across a period and increases down a group.

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

Which has the greater EN: 
Cl or Al?

• Cl
• Al

Which has the greater EN: 
N or C?

• C
• N

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

• Gallium
• Aluminum
• Magnesium
• Strontium

Which of the following is NOT a trend that varies periodically in the periodic table?

• Electronegativity

• Ionization energy

• Symbols of elements

• Atomic radius

The valence electron of element in group 1 =

• 11

• 3

• 5

• 1

Ions are formed when atoms gain or lose ___.

• electrons

• protons

• neutrons

• atomic mass

Which statement is true?

• Cations are negatively charged ions.

• Anions are positively charged ions.

• Cations are positively charged electrons.

• Anions are negatively charged ions.