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तामिळनाडू बोर्ड ऑफ सेकेंडरी एज्युकेशनएस.एस.एल.सी. (इंग्रजी माध्यम) इयत्ता ७

An atom of an element has no electron. Will that atom have any mass or not? Can an atom exist without electron? If so then give example. - Science

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प्रश्न

An atom of an element has no electron. Will that atom have any mass or not? Can an atom exist without electron? If so then give example.

थोडक्यात उत्तर
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उत्तर

  1. Atoms with no electron will have mass, because mass depends on number of Protons and Neutrons though it has no electron.
  2. Atoms can exist without electrons, Matter is build out of neutrons, protons (+) and electrons (-). Matter becomes stable only if it is electrically neutral.
  3. So atoms without electrons do exist and must have their own states (charged or uncharged transfered back and forth in their environment)
  4. Example: He2+. It has 2 protons and 2 neutrons but no electrons.
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पाठ 4: Atomic Structure - Evaluation [पृष्ठ ५२]

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सामाचीर कलवी Science - Term 1 [English] Class 7 TN Board
पाठ 4 Atomic Structure
Evaluation | Q X. 1. | पृष्ठ ५२

संबंधित प्रश्‍न

Define:- Radicals


Write the names of the elements present in the:-

Sodium hydroxide


 Fill in the blank:

Atoms are _____


Define: Ions


What does an atom consist of ? Explain.


Define: Covalent bond


Give two examples for each of ionic and covalent bond.


Who originated the word ‘atom’ ?


State Dalton’s atomic theory.


How did Neils Bohr visualise 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 ?


Define: An Atom:


Fill in the blank

A charged particle is called an _____


Fill in the blank

An _______ is electrically neutral.


Fill in the blank

An excess of electrons produces a ________ charge.


Name the unit in which the radius of an atom is usually expressed.


Write the relation between nanometre and metre.


Fill in the following blanks with suitable words :

In water, the proportion of oxygen and hydrogen is .............. by mass.


How many atoms are there in exactly 12 g of carbon-12 element ? (C = 12 u)


Deduce from the datum provided.

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

Name the gas that.

Turns moist starch iodide paper blue black.


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

Which element will lose electron?


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?


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


Name the sub-atomic particles.


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


1 mole of Gold and Silver contain same number of atoms.


Does the solubility of a substance change with temperature? Explain with the help of an example.


What are the 3 most abundant atoms on the earth?


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