Mendeleev فارسی

Lithium (Li) – Element 3 of the periodic table

Lithium (symbol Li) is element number 3 of the periodic table and belongs to the “Alkali metal” category. Its atomic mass is about 6.94, and its phase under standard conditions is Solid. This element sits in period 2 and group 1 of the periodic table, and its electrons are arranged in shells of 2, 1. The short electron configuration of Lithium is [He] 2s¹. Known uses of Lithium include Lithium-ion batteries, Bipolar disorder medications and Lightweight alloys.

View in the interactive periodic tableAsk the AI assistant

Properties of Lithium

Atomic number
3
Chemical symbol
Li
Atomic mass
6.94
Category
Alkali metal
Period
2
Group
1
Phase
Solid
Protons
3
Electrons
3
Neutrons (approx.)
4
Electron shells
2, 1
Outer-shell electrons
1
Discovered
Johan August Arfwedson (1817)

Electron configuration of Lithium

The electron configuration of Lithium (Li), with 3 electrons, is shown below. The last shell (shell 2) is highlighted:

Full configuration
1s² 2s¹
Short configuration
[He] 2s¹
Last shell
2s¹

What is electron configuration and how is it written?

Electron shells of Lithium

Distribution of 3 electrons of Lithium across shells K to L:

  1. K2
  2. L1

What is a alkali metal?

The alkali metals are the group 1 elements (excluding hydrogen): soft, shiny and highly reactive metals that react violently with water and are never found free in nature.

Uses of Lithium

Frequently asked questions about Lithium

What is the atomic number of Lithium?

The atomic number of Lithium (Li) is 3; that is, every atom of it has 3 protons.

What is the electron configuration of Lithium?

The electron configuration of Lithium (Li) is 1s² 2s¹; in short form it is [He] 2s¹, and its last shell is 2s¹.

What is the chemical symbol of Lithium?

The chemical symbol of Lithium is Li.

Where is Lithium located in the periodic table?

Lithium is located in period 2 and group 1 and belongs to the “Alkali metal” category.

What is the atomic mass of Lithium?

The atomic mass of Lithium is about 6.94 (atomic mass units).

What is the phase of Lithium under normal conditions?

The phase of Lithium under standard conditions is Solid.

What are the uses of Lithium?

Uses of Lithium include Lithium-ion batteries, Bipolar disorder medications and Lightweight alloys.

Who discovered Lithium?

Lithium was discovered by Johan August Arfwedson in 1817.

Elements in the same category as Lithium (Alkali metal)

Sodium (Na)Potassium (K)Rubidium (Rb)Cesium (Cs)Francium (Fr)

See all Alkali metals

Lithium’s group 1 neighbours

Hydrogen (H)Sodium (Na)Potassium (K)Rubidium (Rb)Cesium (Cs)Francium (Fr)

Group 1 of the periodic table