English

Define the Following Term Atom . - Chemistry

Advertisements
Advertisements

Question

Define the following term  of Atom .

Definition
One Line Answer
Advertisements

Solution

Atom — An atom is the smallest part of an element that takes place in a chemical reaction.

shaalaa.com
  Is there an error in this question or solution?
Chapter 1: Matter and Its Composition - Additional questions

APPEARS IN

Selina Concise Chemistry [English] Class 7 ICSE
Chapter 1 Matter and Its Composition
Additional questions | Q 22.4

RELATED QUESTIONS

What are the characteristics of matter?


The three important metalloids are.............................. and ..........................


Name a metal which can be easily cut with a knife.


What is the most common way of expressing the concentration of a solution ?


State whether the following statement is true or false :

Bread is an example of solid foam.


Which of the following is a sol ?

Shaving cream, Milk, Fog, Soap solution, Hairspray


Explain what happens when a beam of light is passed through a colloidal solution.


What is meant by the concentration of a solution ?


Fill in the following blanks with suitable words :

A mixture of kerosene and petrol can be separated by .....................


Which of the following cannot be separated from air by the process of fractional distillation ?


A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with
cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the
process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And
S is a white solid which is used in making ordinary dry cells.

  1. What could P, Q, R and S be ?
  2. How would you separate a mixture containing P, Q, R and S ?

Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z.

  1. What could X be ?
  2. What could Y be ?
  3. Name the process Z.
  4. Which process would you use to recover both the components X and Y from tincture of iodine ?
  5. Which process can be used to recover only component Y from tincture of iodine ?

Differentiate between the-two characteristics of matter – ‘mass’ & ‘weight’.


Name the metals that are used in jewellery.


Which among the following is not a matter?


Atoms are tiny particles that repel each other when they are squeezed very close.


The pressure of gases does not depend on the temperature of the gas and the volume it occupies.


Define the term matter.


Define the term matter.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×