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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.
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उत्तर
- Atoms with no electron will have mass, because mass depends on number of Protons and Neutrons though it has no electron.
- Atoms can exist without electrons, Matter is build out of neutrons, protons (+) and electrons (-). Matter becomes stable only if it is electrically neutral.
- So atoms without electrons do exist and must have their own states (charged or uncharged transfered back and forth in their environment)
- Example: He2+. It has 2 protons and 2 neutrons but no electrons.
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संबंधित प्रश्न
TRUE \ FALSE
Elements having a tendency to accept electrons are called metals
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
Define:- Atom
Define: Ions
Give the charge and the mass of an electron, proton and neutron present in an atom ?
Who originated the word ‘atom’ ?
Name the particle or particles you would expect to find in :
The nucleus of an atom
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
Does the particle have an excess of electrons or a deficiency of electrons ?
How many times is a proton heavier than an electron?
Is it possible to see atoms these days ? Explain your answer.
An atom of an element X may be written as `""_9^4"X"`
(a) What does the figure 9 indicate?
(b) What does the figure 4 indicate?
(c) What is the number of protons in atom X?
(d) What is the number of neutrons in atom X?
(e) What is the number of electrons in atom X?
(f) How many electrons are there in the outermost shell of an atom of element X?
(g) Write the symbol of ion formed by an atom of element X.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will gain electron?
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form positive ion?
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
Rewrite the given sentence in correct form.
Elements contain two or more kind of atoms and compounds contain only one kind of atom.
The smaller particles found in the atom is called ______.
Define the following term with an example.
Compound
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?
