AI Education

29/10/2026

Little girl

29/10/2026

Element 89: Actinium (Ac)

Definition: Actinium is a radioactive chemical element with atomic number 89. It is a soft, silvery-white metal that belongs to the actinide series. It was discovered by André-Louis Debierne in 1899.

Symbol: Ac Atomic Number: 89 Atomic Mass: 227 u State: Solid Nature: Radioactive metal

28/10/2026

88\. Radium (Ra)

Radium is a radioactive chemical element with atomic number 88. It is a silvery-white metal that belongs to the alkaline earth metals group. It was discovered by Marie Curie and Pierre Curie in 1898. Radium is highly radioactive and is found naturally in small amounts in uranium ores.

28/10/2026

Human degistive system with clay

28/10/2026

# # # Element 87: Francium (Fr)

Definition: Francium is a highly radioactive chemical element with the symbol Fr and atomic number 87. It is a soft, alkali metal that occurs naturally in very small amounts. It is extremely rare and highly unstable.

* Symbol: Fr

* Atomic Number: 87

* Atomic Mass: Approximately 223 u

* Group: 1

* Period: 7

* Category: Alkali Metal

28/10/2026

Clay made computer

27/10/2026

27/10/2026

# # # Radon (Rn) — Atomic Number 86

Definition: Radon is a radioactive chemical element with the symbol Rn and atomic number 86. It belongs to Group 18 of the periodic table and is a member of the noble gas family. Radon is a colorless, odorless, and tasteless gas. It is formed naturally by the radioactive decay of uranium and radium in rocks and soil. Radon is a heavy gas and is radioactive in nature. Its most stable isotope is radon-222, which has a half-life of about 3.8 days. Radon can accumulate inside buildings and may cause serious health problems if people breathe it in over a long period.

27/10/2026

Clay made moto pattlo

27/10/2026

Element 85: Astatine (At)

* Name: Astatine

* Atomic Number: 85

* Symbol: At

* Category: Halogen

* State: Solid

* Description: Astatine is a very rare and radioactive chemical element. It belongs to Group 17 of the periodic table.