What Is A Molecule Class 9

What is a molecule Class 9?

A molecule is the smallest thing a substance can be divided into while remaining the same substance. It is made up of two or more atoms that are bound together by chemical bonding.

What is a molecule short definition?

A molecule is two or more atoms connected by chemical bonds, which form the smallest unit of a substance that retains the composition and properties of that substance.

What are molecules 3 examples?

  • H2O (water)
  • N2 (nitrogen)
  • O3 (ozone)
  • CaO (calcium oxide)
  • C6H12O6 (glucose, a type of sugar)
  • NaCl (table salt)

What is compound class 9?

What is a Compound? When two or more elements chemically combine in a fixed ratio by mass, the obtained product is known as a compound. Compounds can be defined as substances consisting of 2 or more different types of elements in a fixed ratio of their atoms.

What is molecule class 9 chapter 3?

Answer: The smallest particle of matter, which can take part in a chemical reaction is called atom. Question 5. Define molecule. Answer: The smallest particle of an element or compound which can exist independently is called molecule.

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What is ions Class 9?

Ion :- It is an electrically charged atom or molecule formed by loss or gain of electrons. Ion formed by loss of electron is called cation. Example:- Magnesium ion ⟶Mg2+ Ion formed by gain of electron is called anion.

What’s a molecule in biology?

A molecule is the smallest unit of matter that has distinctive chemical and physical properties. A molecule owns a definite size and mass. Two or more atoms (same or different) held together by a chemical bond form a molecule wherein the ratio of two atoms is fixed in an element.

What is a molecule for kids?

A molecule is two or more atoms joined (or “bonded”) tightly together. The number and kinds of atoms in a molecule, and the way they are arranged, determine what substance it makes. For example, a molecule made of two oxygen atoms joined to one carbon atom forms carbon dioxide, a colorless gas.

Why is it a molecule?

Whether something is a molecule or not depends on the type of bond that is formed when its atoms join together. In general, electrons can be shared between atoms (a molecular bond) or electrons can be completely removed from one atom and given to another (an ionic bond). Molecules have molecular bonds.

What is molecules class 11?

A group of two or more than two atoms of the same or different elements that are chemically bonded together is called a molecule. For example, two atoms of hydrogen and one atom of oxygen react with each other and form one molecule of water.

What is molecule Class 11 example?

Molecule is defined as the combination of one or more atoms that are combined with the help of chemical bonds. These bonds can be covalent, ionic, metallic or co-ordinate bonds. For example water, it is a molecule which is formed of two hydrogen atoms and one oxygen atom.

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What is molecule in a sentence?

The planet was bathed in a broth of organic molecules. Within a molecule atoms occur in fixed proportions.

Is Gold a compound?

Gold is a chemical element with symbol Au and atomic number 79. Classified as a transition metal, Gold is a solid at room temperature.

What are 10 elements examples?

Answer: The first ten elements of the periodic table are hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon.

What is homogeneous class 9?

A mixture is said to be homogeneous if its constituents are uniformly mixed and it has the same properties throughout. The constituents of a homogeneous mixture cannot be easily separated. For example, the air is a homogeneous mixture of different gases.

What is molecule in biology?

A molecule is the smallest unit of matter that has distinctive chemical and physical properties. A molecule owns a definite size and mass. Two or more atoms (same or different) held together by a chemical bond form a molecule wherein the ratio of two atoms is fixed in an element.

What is atomicity class 9?

The number of atoms present in a molecule of an element is called its atomicity.