Periodic Table & Trends

Front

Which group of the periodic table is composed of inert (not reactive) gases?

Back

Noble gases are the group of the periodic table that are composed of inert gases.

Front

As you move across the periodic table, why do atoms tend to get smaller?

Back

Atoms tend to get smaller because they have more protons, which increases the positive charge in the nucleus and pulls the electrons closer.

Front

What do elements in a group have in common?

Back

Elements in a group have similar chemical properties.

Front

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

Back

Francium has the lowest ionization energy because its 1 valence electron is very far from the nucleus, so little energy is needed to remove it.

Front

How many valence electrons are in an atom of Argon (Ar)?

Back

An atom of Argon (Ar) has 8 valence electrons.

Front

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

Back

As you move down a group in the periodic table, the atomic radius increases due to the addition of electron shells.

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom.

Front

What is the trend for ionization energy as you move across a period?

Back

Ionization energy generally increases as you move from left to right across a period.

Front

What are alkali metals?

Back

Alkali metals are the elements found in Group 1 of the periodic table, known for being highly reactive.

Front

What is electronegativity?

Back

Electronegativity is a measure of an atom's ability to attract and hold onto electrons.