Fe₃O₄ is a compound consisting of iron and oxygen.

• The compound is also known as magnetite.
• It has magnetic properties.
• Fe₃O₄ can be found in igneous rocks.

Prime numbers less than 20: 2, 3, 5, 7, 11, 13, 17, 19 Composite numbers less than 20: 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20

Fe₃O₄, commonly referred to as magnetite, is an iron oxide that exhibits unique magnetic properties. This compound is typically found in igneous rocks and plays a significant role in geology and various industrial applications.

Characteristics of Magnetite

Magnetite is notable for its strong magnetic behavior, which makes it useful in various technologies, including magnetic storage devices and as a catalyst in chemical reactions.

Occurrence in Nature

• Found in igneous rocks
• Often associated with other minerals
• Can form in sedimentary environments as well

Understanding Prime and Composite Numbers

In mathematics, numbers can be classified as either prime or composite. Prime numbers are those greater than 1 that have no divisors other than 1 and themselves, while composite numbers have additional divisors.

List of Prime Numbers Less Than 20

• 2
• 3
• 5
• 7
• 11
• 13
• 17
• 19

List of Composite Numbers Less Than 20

• 4
• 6
• 8
• 9
• 10
• 12
• 14
• 15
• 16
• 18
• 20

Understanding these classifications helps in various mathematical applications and enhances problem-solving skills.