The Periodic Table: Atomic Radius, Ionization Energy, Prof Dave

Who proposed the periodic table of elements?

• Dmitri Mendeleev

• Marie Curie

• Isaac Newton

• Albert Einstein

What is the reason for elements in the same group behaving similarly?

• They have the same number of valence electrons

• They have the same number of protons

• They have the same atomic mass

• They have the same number of neutrons

What happens to the atomic radius as we proceed downward on the periodic table?

• It increases

• It decreases

• It remains constant

• It fluctuates

What is the trend for ionization energy as we move from left to right on the periodic table?

• It decreases

• It increases

• It fluctuates

• It remains constant

What is the opposite of ionization energy?

• Atomic radius

• Valence electrons

• Electron affinity

• Electronegativity

Which element has the highest electron affinity?

• Helium

• Fluorine

• Lithium

• Sodium

What is the ability of an atom to hold electrons tightly called?

• Electron affinity

• Ionization energy

• Atomic radius

• Electronegativity

What determines many characteristics about each element?

• The number of valence electrons

• The number of protons

• The atomic mass

• The number of neutrons