2024-25 Organization of the Periodic Table and Periodic Trends

Front

What is the oxidation number of Boron?

Back

3+

Front

Define ionization energy.

Back

The amount of energy required to remove an electron from an atom.

Front

Which group of elements does Sodium belong to?

Back

Alkali metals.

Front

What color represents halogens on the periodic table?

Back

Red.

Front

Who first ordered the periodic table by increasing atomic mass?

Back

Dmitri Mendeleev.

Front

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

Back

Atomic radius increases.

Front

What is the periodic trend for electronegativity as you move across a period?

Back

Electronegativity increases.

Front

What are the main characteristics of alkali metals?

Back

They are highly reactive, have one electron in their outer shell, and are soft.

Front

What is the significance of the periodic law?

Back

It states that the properties of elements are a periodic function of their atomic numbers.

Front

What is the general trend for ionization energy as you move down a group?

Back

Ionization energy decreases.