Periodic Trends

Which has the greater EN: 
Cl or Al?

• Cl
• Al

Which has the greater EN: 
N or C?

• C
• N

Which has the greater EN: 
H or F?

• H
• F

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

• Ar
• He
• Kr
• Rn

Electronegativity is...

• how good an atom is at attracting electrons
• the ability of an atom to lose electrons
• the energy required to remove an electron from a specific atom
• how easy it is to make friends. 

Atoms that have a high electronegativity, _______________.

• give up their electrons more easily.
• hold on to their electrons more tightly.
• have more electron shells.

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.

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

Which periodic group has the smallest atomic radius?

• Alkali metals
• Halogens
• Noble Gases
• Transition metals

The element with the lowest electronegativity in Period 3 is - 

• Na
• Cl
• Ar
• Mg