Exploring Periodic Table Trends

Front

How are elements organized in the modern periodic table?

Back

Elements are organized by atomic number.

Front

What happens to the ionic radius when a sodium atom (Na) loses an electron to form a sodium ion (Na⁺)?

Back

The sodium ion (Na⁺) has a smaller radius than the neutral sodium atom (Na).

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

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

Front

Arrange the following in order of increasing ionic/atomic radius: Sr, Sr²⁺, Mg²⁺.

Back

Mg²⁺, Sr²⁺, Sr.

Front

What is the definition of atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is ionization energy?

Back

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

Front

What is the trend of ionization energy across a period?

Back

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

Front

What is the trend of atomic radius down a group?

Back

Atomic radius generally increases down a group.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom.