Periodic Trends

Front

Why does atomic radius increase as you move down a group?

Back

You add more and more shells (energy levels).

Front

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

Ar

,

He

,

Kr

,

Rn

Back

Rn

Front

As you move across the periodic table from left to right, the atomic radius decreases. Why?

Back

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

Front

Atom with the largest atomic radius in Period 4

Back

K

Front

Why does Francium (Fr) have the lowest ionization energy in Group 1?

Back

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

Front

The energy required to remove electrons is the definition of:

Back

Ionization energy

Front

What do families all have similar?

Back

chemical and physical properties

Front

Electronegativity

Back

the ability of an atom to attract/ accept electrons

Front

Which has the greater Electronegativity: N or C?

Back

N

Front

Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.

Back

increases, decreases