Periodic Trends_2024

you add more and more neutrons

you add more and more protons

you add more and more shells (energy levels)

you add more atomic mass

Ar

He

Kr

Rn

the number of protons increases and more electrons are added in the same shell, therefore nucleus attracts electrons more strongly.

the number of protons increases and more electrons are added in a different shell, therefore nucleus attracts electrons more strongly.

the number of protons increases and more electrons are added in the same shell, therefore nucleus attracts electrons more poorly

the number of protons increases and more electrons are added in a different shell, therefore nucleus attracts electrons more poorly.

K

Kr

Fe

Fe

its valence electron is very close to the nucleus, so more energy is needed to remove it

its valence electron is very far from the nucleus, so more energy is needed to remove it

it has the greatest number of protons, so it attracts its electrons the strongest

its valence electron is very far from the nucleus, so little energy is needed to remove it

Electronegativity

Atomic Number

Atomic Radius

Ionization energy

Names

atomic numbers

atomic masses

chemical and physical properties

the ability of an atom to attract/ accept electrons

the ability of an atom to lose electrons

the energy required to remove an electron from an atom

how easy it is to make friends.

C

N

decreases, increases

increases, increases

increases, decreases

stays the same, increases