Periodic Table and Reactivity

Front

Beryllium is in group number______.

Back

Group 2

Front

How many groups are there in the modern periodic table?

Back

18

Front

Who would be in the same period as this element? (Example: Aluminum)

Back

Aluminum

Front

The group number tells you the number of ______.

Back

valence electrons

Front

Number of valence electrons in halogens is ..........

Back

7

Front

What is the periodic table?

Back

A tabular arrangement of chemical elements, organized by their atomic number, electron configuration, and recurring chemical properties.

Front

What do periods in the periodic table represent?

Back

The number of energy levels or shells in an atom.

Front

What are alkali metals?

Back

Elements in group 1 of the periodic table, known for being highly reactive and having one valence electron.

Front

What are noble gases?

Back

Elements in group 18 of the periodic table, known for their lack of reactivity due to having a full valence shell.

Front

What is the significance of the atomic number?

Back

It represents the number of protons in an atom's nucleus and determines the element's identity.