Periodic Trends Flashcards
What is atomic radius?
Size of an atom
What is ionization energy?
The energy required to remove an electron from an atom
What is electronegativity?
The ability for an atom to attract an electron
What is electron affinity?
The amount of energy released when an electron is added to a neutral atom
Does atomic radius increase towards francium or helium?
Francium
Does ionization energy increase towards francium or helium?
Helium
Does electronegativity increase towards francium or helium?
Helium
Does electron affinity increase towards francium or helium?
Helium
What is chemical reactivity?
Describes how easily an atom will react or lose electrons
Does chemical reactivity increase towards francium or helium?
Francium
What is ENC (effective nuclear charge)?
The net positive charge experienced by valence electrons
Why do elements with more electrons have a smaller ENC?
If an atom has more electrons, that means it has more core electrons, so the core electrons slightly reduce the effect of the protons.
Does ENC increase towards francium or helium?
Helium
Order these in order of increasing atomic radius:
cation, anion, atom.
cation < atom < anion
