Periodic Table

Front

Who proposed a model with electrons moving in specific layers?

Back

Bohr

Front

What is the atomic number of Beryllium (Be)?

Back

4

Front

What is the electron configuration of Sodium (Na)?

Back

1s² 2s² 2p⁶ 3s¹

Front

Who discovered the nucleus of the atom?

Back

Rutherford

Front

What are the vertical columns on the periodic table called?

Back

Groups

Front

What is the significance of the periodic table in chemistry?

Back

It organizes elements based on their atomic number, electron configurations, and recurring chemical properties.

Front

What is the difference between a period and a group in the periodic table?

Back

A period is a horizontal row, while a group is a vertical column.

Front

What element has the atomic number 11?

Back

Sodium (Na)

Front

What are the main categories of elements in the periodic table?

Back

Metals, Nonmetals, and Metalloids.

Front

What is the most reactive group of metals in the periodic table?

Back

Alkali metals (Group 1).