Periodic Table & Trends

Front

What do elements in the same column of the periodic table have in common?

Back

They have the same number of valence electrons.

Front

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

Back

Its 1 valence electron is very far from the nucleus, so little energy is needed to remove it.

Front

What happens to the electronegativity of elements in Group 16 as you move from top to bottom?

Back

The electronegativity decreases.

Front

What are the vertical columns in the Periodic Table called?

Back

Groups.

Front

What are the elements along the staircase in the Periodic Table called?

Back

Metalloids.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the trend in atomic radius as you move down a group in the periodic table?

Back

The atomic radius increases.

Front

What is ionization energy?

Back

The energy required to remove an electron from an atom.

Front

What is the trend in ionization energy as you move across a period from left to right?

Back

Ionization energy generally increases.

Front

What are noble gases?

Back

Elements in Group 18 that are characterized by their lack of reactivity due to having a full valence shell.