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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. What Will Be the Charge Present of the Molecule Xy After Chemical Combination?

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प्रश्न

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

What will be the charge present of the molecule XY after chemical combination?

एक शब्द/वाक्यांश उत्तर
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उत्तर

electrically neutral

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पाठ 4: Atomic Structure - Additional questions

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एस.पी. सिंह Concise Chemistry [English] Class 7 ICSE
पाठ 4 Atomic Structure
Additional questions | Q 6.5

संबंधित प्रश्‍न

TRUE \ FALSE

Elements having a tendency to accept electrons are called metals

 


WRITE SHORT ANSWER

Define an ionic compound.


Write the names of the elements present in the :- 

Sulphuric acid


Give two examples for each of ionic and covalent bond.


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


An atom has 13 protons and 14 neutrons.

What is the atomic number of the atom ?


An atom has 13 protons and 14 neutrons.

How many electrons would be present in this atom ?


An atom has 13 protons and 14 neutrons.

What is the atomic mass of the atom ?


What is the usual symbol for (a) and electron (b) a proton, and (c) a neutron?


How is the size of an atom indicated ?


One nm is equal to :


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


A radical take part – unsplit in a chemical reaction and retains its identity in reactions.
With reference to the radical –

  1. ammonium
  2. bisulphate
  3. carbonate

state the group of atoms present in each radical.


Select the correct answer to the statement given below:

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


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

The basic unit of an element is molecule.


In all atoms of an element


In the nucleus of `""_20"Ca"^40`, there are ______


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


A sample of vitamic C is known to contain 2.58 ×1024 oxygen atoms. How many moles of oxygen atoms are present in the sample?


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