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Define the following term with an example. Metal - Science

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प्रश्न

Define the following term with an example.

Metal

परिभाषा

उत्तर

Metal:  A chemical element that is an effective conductor of electricity and heat can be defined as a metal.

Ex.: Copper, Iron, Silver, etc.

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अध्याय 3: Matter Around Us - Evaluation [पृष्ठ ३९]

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सामाचीर कलवी Science - Term 1 [English] Class 7 TN Board
अध्याय 3 Matter Around Us
Evaluation | Q V. 4. c. | पृष्ठ ३९

संबंधित प्रश्न

The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes `""_8^16X" and """_8^18X` in the sample?


MATCH THE COLUMNAS

1. Jpham  Dalton a. Neutrons
2. Atom b. Model of the atom
3. Chadwick c.The atomic theory of matter 
4. Rutherfrod d. Positively  charged 
5. Protons e. Electricity neutral 
6. Nuclear  fusion  f. Generator of electricity 
7.Gamma -rays  g. High penetrating power 
  h.Energy in sun 

TRUE \ FALSE

Neils Bohr gave the theory to explain the arrangement of protons in an atom.


WRITE SHORT ANSWER

Define an ionic compound.


WRITE SHORT ANSWER

What is radioactivity?


ANSWER IN DETAIL

State the postulates of the Dalton’s atomic theory.


Define:- Atom


Define:- Radicals


Fill in the blank

An ion with negative charge is called _______


Define: Chemical bond


Define: Mass number


 Give the charge and the mass of an electron, proton and neutron present in an atom ?


Define: Covalent bond


Write electronic configuration of oxygen, fluorine, sodium, silicon, argon.


Name the particle or particles you would expect to find in :

The orbit of an atom


An atom has 13 protons and 14 neutrons.

What is the atomic number of the atom ?


Write the relation between nanometre and metre.


How many atoms are there in exactly 12 g of carbon-12 element ? (C = 12 u)


Draw the basic structure of an atom representing its –

  1. Subatomic particles
  2. Nucleus
  3. Orbits or shells.

Select the correct answer to the statement given below:

Imaginary path around the nucleus of an atom in which electrons revolve.


The basic unit of matter is ______.


K: Potassium:: C: ______.


______ is the smallest particle of an element.


The volume occupied by 4.4 g of CO2 at S.T.P ______


1 mole of Gold and Silver contain same number of atoms.


A change in the physical state can be brought about


Write any two observations which support the fact that atoms are divisible.


What is the fundamental particle of an element?


Atoms have a radius of the order ______.


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