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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

What Does an Atom Consist of ? Explain. - Chemistry

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प्रश्न

What does an atom consist of ? Explain.

एक पंक्ति में उत्तर
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उत्तर

An atom consists protons, electrons and neutrons. Protons are positively charged, electrons have negative charge while neutrons have no charge

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अध्याय 4: Atoms, Molecules and Radicals - Additional questions

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सेलिना Concise Chemistry [English] Class 7 ICSE
अध्याय 4 Atoms, Molecules and Radicals
Additional questions | Q 2

संबंधित प्रश्न

Define:- Atom


Write the names of `"FeS"` compounds :


Fill in the blank

An ion with positive charge is called ______


Who originated the word ‘atom’ ?


Define: An Atom:


Fill in the blank

An _______ is electrically neutral.


State two observations which show that atom is not indivisible.


The electronic configuration of an element Z is 2, 8, 8.
(a) What is the atomic number of the element?
(b) State whether element Z is a metal or a non-metal.
(c) What type of ion (if any) will be formed by an atom of element Z? Why?
(d) What is special about the outermost electron shell of the atom of this element?
(e) Give the name and symbol of element Z.
(f) Name the group of elements to which Z belongs.


Find the mass of 2 moles of nitrogen atoms.


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)


Select the correct answer to the statement given below:

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


The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus


A compound containing one atom of carbon and two atoms of oxygen is ______.


Rewrite the given sentence in correct form.

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


State true or false. If false, correct the statement.

The basic unit of an element is molecule.


The volume occupied by 1 mole of a diatomic gas at S.T.P is ______


Which of the following has maximum number of atoms?


You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?


A small block slides down on a smooth inclined plane, starting from rest at time t = 0. Let Sn be the distance travelled by the block in the interval t = n – 1 to t = n. Then, the ratio `S_n/(S_(n + 1))` is ______.


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