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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ७

Define the following term with an example. Metal - Science

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प्रश्न

Define the following term with an example.

Metal

परिभाषा
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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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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
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

If bromine atom is available in the form of, say, two isotopes `""_35^79Br (49.7%)" and """_35^81Br (50.3%)`, calculate the average atomic mass of bromine atom.


ANSWER IN DETAIL

State the postulates of the Dalton’s atomic theory.


ANSWER IN DETAIL

Enlist the features of Bohr’s model of an atom. How did he correct the Rutherford’s model ?


Define: Mass number


Define: Relative atomic mass


 Name the particles which revolve around the nucleus.


Name three non-metals/radicals which have valency -1, -2, and -3.


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

The nucleus of an atom


Fill in the blank

If an atom gains an electron, it is called an _______


Fill in the blank

An _______ is electrically neutral.


Fill in the blank

An excess of electrons produces a ________ charge.


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


Compare: 

Chlorine atom and chloride ion, with respect to

Atomic structure
Electrical state


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

Which will form negative ion?


Select the correct answer to the statement given below:

The basic unit of matter is not capable of independent existence.


Rewrite the given sentence in correct form.

Elements contain two or more kind of atoms and compounds contain only one kind of atom.


Which of the following statements made by Dalton has not undergone any change?


In all atoms of an element


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


Give the salient features of “Modern atomic theory”.


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