Periodic Trends

The element with the lowest electronegativity in Period 3 is -

• Na

• Cl

• Ar

• Mg

The element with the largest electronegativity in the halogens is - 

• At
• F
• Cl
• Br

Ionization energy is __________

• Energy required to add an electron to a specific atom

• Energy required to remove an electron from an atom to form a cation

• Energy required to shield the outer electrons from the nucleus

• Measure of the ability of an atom to attract electrons

Electronegativity is a measure of

• How strongly an atom attracts electrons in a covalent bond

• The ability of an atom to lose electron

• The energy required to remove an electron from a specific atom

• How easy it is to make friends. 

As you move across the period atoms tend to get smaller because, ______________.

• the atoms have more mass.
• the atoms have same energy levels

• the atoms have more protons.
• the atoms have more 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 neutrons

In group 2, which of these elements has the lowest electronegativity?

• Ba

• Mg

• Ca

• La

Put in order from biggest to smallest (decreasing size)

• Iron

• Bromine

• Zinc

• Calcium

• Krypton

Which element has the greater ionization energy?

• Magnesium
• Phosphorus
• Barium

• Nitrogen

Put the following in order of increasing ionization energy:

• Neon

• Boron

• Lithium

• Carbon

• Oxygen