Question

The element with the atomic number 11 belongs to the ____.
a. First group
b. Second group
c. First period
d.Second period​

Answer 1

Answer:

Period Number 3

Alkali metals group.

Explanation:

Sodium is the element that is atomic number 11 on the periodic table. It is located in the alkali metals group on the far left side of the periodic table.

Sodium::

Sodium is a very soft silvery-white metal. Sodium is the most common alkali metal and the sixth most abundant element on Earth, comprising 2.8 percent of Earth's crust.

Boiling point: 882.9 °C (1,621 °F)

Electron configuration: 2-8-1 or 1s22s22p63s1

Oxidation states: +1, −1 (rare)