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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Elements X and Y Have 1 and 7 Electrons in Their Outermost Shell Respectively. Which Will Form Positive Ion? - Chemistry

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प्रश्न

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

Which will form positive ion?

एक शब्द/वाक्यांश उत्तर

उत्तर

X

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पाठ 4: Atoms, Molecules and Radicals - Additional questions

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सेलिना Concise Chemistry [English] Class 7 ICSE
पाठ 4 Atoms, Molecules and Radicals
Additional questions | Q 6.3

संबंधित प्रश्‍न

ANSWER IN DETAIL

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


Write the names of the elements present in the:- 

Glucose


Name two particles found inside the nucleus. What are they collectively called ?


What does the word ‘atom’ mean?


An atom has 13 protons and 14 neutrons.

What is the atomic number of the atom ?


Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.


Deduce from the datum provided.

Datum To deduce
\[\ce{_11^23Na}\] Neutron number
\[\ce{_6^14C}\] Mass number
\[\ce{_17^37 Cl}\]  Proton number

Compare: 

Chlorine atom and chloride ion, with respect to

Atomic structure
Electrical state


Draw the diagrams representing the atomic structures of the following: Neon


Select the correct answer to the statement given below:

The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.


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


Define the following term with an example.

Element 


Assertion: An atom is electrically neutral.

Reason: Atoms have equal number of protons and electrons.


Define the following term with an example.

Compound


Define the following term with an example.

Metal


In all atoms of an element


Atoms of different elements having the same number of ______ are called isotones.


Give the salient features of “Modern atomic theory”.


A change in the physical state can be brought about


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