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सी.आई.एस.सी.ई.आईसीएसई 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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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 6.3

संबंधित प्रश्न

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 

Define:- Atom


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

Common salt


Write the names of `("NH"_4)_2"SO"_4` compounds:


Define: Covalent bond


What does the word ‘atom’ mean?


An atom has 13 protons and 14 neutrons.

What is the atomic mass of the atom ?


A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.

What is the atomic numebr of X ?


Fill in the blank

If an atom loses an electron, it acquires ______ a charge.


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


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

Which will form negative ion?


State the meaning of the term – (a) atom, (b) molecule, (c) radical – with a suitable example.


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.


Select the correct answer to the statement given below:

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


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


K: Potassium:: C: ______.


Atoms of one element can be transmuted into atoms of other elements by ______


The number of atoms present in a molecule is called its ______.


The smallest unit of an element is ______.


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