English

Define : an Atom:

Advertisements
Advertisements

Question

Define: An Atom:

Definition
Advertisements

Solution

An Atom: Smallest particle of an element that can exist and have properties of an element.

shaalaa.com
  Is there an error in this question or solution?
Chapter 4: Atomic Structure - Additional questions

APPEARS IN

S.P. Singh Concise Chemistry [English] Class 7 ICSE
Chapter 4 Atomic Structure
Additional questions | Q 21.1

RELATED QUESTIONS

Write the names of the elements present in the following compound.

Common salt


Fill in the blank

An ion with positive charge is called ______


Define: Covalent bond


How is the size of an atom indicated ?


Why is it not possible to see an atom even with the most powerful microscope ?


What is an atom ? How do atoms usually exist ?


Which has more atoms, 50 g of aluminium or 50 g of iron ? Illustrate your answer with the help of calculations.

(Atomic masses : Al = 27 u ; Fe = 25 u)


The electron shell ______ is nearest to the nucleus.


What is the contribution of the following in atomic structure?
Maharshi Kanada


Elements X and Y have 1 and 7 electrons in their outermost shell respectively.

Which element will lose electron?


Elements X and Y have 1 and 7 electrons in their outermost shell respectively.

Which element will gain electron?


Elements X and Y have 1 and 7 electrons in their outermost shell respectively.

What will be the charge present of the molecule XY after chemical combination?


A radical take part – unsplit in a chemical reaction and retains its identity in reactions.
With reference to the radical –

  1. ammonium
  2. bisulphate
  3. carbonate

state the group of atoms present in each radical.


K: Potassium:: C: ______.


Project.

To have an idea of what atoms are, students can be asked to construct atoms using pipe cleaners (thin metal wires-electron shells), pompoms (balls-different colours for protons and neutrons) and beads (electrons). Students will love and enjoy putting them together and they look great hanging from the ceiling in the classroom.


Give the salient features of “Modern atomic theory”.


The smallest unit of an element is ______.


What are the 3 most abundant atoms on the earth?


The ______ are combination of atoms of various elements or the same element.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×