Advertisements
Advertisements
Question
Differentiate between an atom and a molecule.
Solution
| Atom | Molecule | ||
| 1. | Atoms are described as the smallest particles of an element that do not exist freely in nature but participate directly in chemical reactions. | 1. | A molecule consists of bound atoms that exist freely in nature but do not directly participate in chemical combinations. |
| 2. | The symbol of an element represents its atom. For example, the symbol H represents a hydrogen atom. | 2. | The molecular formula represents any substance's molecule. For example, the oxygen molecule is represented as O2. |
| 3. | An atom is made up of subatomic particles i.e., electrons, protons, and neutrons. | 3. | Molecules are made up of two or more atoms, which either be from the same or different elements. |
APPEARS IN
RELATED QUESTIONS
Liquids have definite volume but do not have definite shape.
All kinds of matter
What is the scientific name of particles which make up mater?
The best evidence for the existence and movement of particles in liquids was provided by :
Which of the following are not compounds ?
Chlorine gas, Potassium chloride, Iron powder, Iron sulphide, Aluminium foil, Iodine vapour, Graphite, Carbon monoxide, Sulphur powder, Diamond
Define solute.
Define solvent.
Fill in the following blanks with suitable words :
A mixture of kerosene and petrol can be separated by .....................
Describe a method to separate a mixture of common salt and sand.
How is cream separated from milk ?
The liquid air has three components X, Y and Z whose boiling points are : –186°C, –183°C and –196°C,
respectively. When liquid air is fed into a tall fractional distillation column from near its bottom and warmed
up slowly :
(a) Which component will be collected from near the bottom of the fraction distillation column ? Why ?
(b) Which component will be collected from the top part of the fractional distillation column ? Why ?
(c) Which component will be collected from the middle part of the fractional distillation column ? Why ?
(d) What could the component X, Y and Z be ?
Asmita went to buy an earthen pot. There she saw many things kept for sale.
How did she identify what she needed?
______ is not made of matter.
Matter is made up of ______.
All the matter made of ______.
Complete the following table:
| S.No. | CELSIUS | KELVIN |
| 1. | 90°C | 363 K |
| 2. | ______ | 283 K |
| 3. | 63 °C | ______ |
| 4. | 250°C | ______ |
| 5. | ______ | 303 K |
Solid is an arrangement of particles ______.
Atoms are tiny particles that repel each other when they are squeezed very close.
Write a scientific reason.
Lemon sherbat has a sweet, sour and salty taste and it can be poured in a glass.
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
