Advertisements
Advertisements
рдкреНрд░рд╢реНрди
Deduce from the datum provided.
| Datum | To deduce |
| \[\ce{_11^23Na}\] | Neutron number |
| \[\ce{_6^14C}\] | Mass number |
| \[\ce{_17^37 Cl}\] | Proton number |
Advertisements
рдЙрддреНрддрд░
| Datum | To deduce |
| \[\ce{_11^23Na}\] | Neutron number = Mass number - Number of protons = 23 − 11 = 12 |
| \[\ce{_6^14C}\] | Mass number = 14 |
| \[\ce{_17^37 Cl}\] | Proton number = Atomic number = 17 |
APPEARS IN
рд╕рдВрдмрдВрдзрд┐рдд рдкреНрд░рд╢реНтАНрди
The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes `""_8^16X" and """_8^18X` in the sample?
Write the names of the elements present in the :-
Sulphuric acid
Write the names of `"FeS"` compounds :
What does an atom consist of ? Explain.
An atom has 13 protons and 14 neutrons.
What is the atomic mass of the atom ?
Fill in the blank
If an atom gains an electron, it is called an _______
Fill in the blank
A charged particle is called an _____
Fill in the blank
A deficiency of electrons produces a ________ charge.
Give brief information of three subatomic particles with reference to electrical charge, mass and location.
The electron shell ______ is nearest to the nucleus.
In what respects do the three isotopes of hydrogen differ? Give their structures.
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?
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of aluminium
Rewrite the given sentence in correct form.
Elements contain two or more kind of atoms and compounds contain only one kind of atom.
The basic unit of matter is ______.
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.
You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
