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प्रश्न
Fill in the blanks.
Isotopes are the atoms of ______ element having the ______ atomic number but ______ mass number.
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उत्तर
Isotopes are the atoms of same element having the same atomic number but different mass number.
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संबंधित प्रश्न
If number of electrons in an atom is 8 and number of protons is also 8, then
- What is the atomic number of the atom? and
- What is the charge on the atom?
Fill in the blank
An ion which has a positive charge is called a ..................
Write true or false for the following statement
An atom on the whole has a positive charge.
TRUE \ FALSE
After the emission of a beta-particle, the atomic number of the atom increases by one.
(a) What is meant by (i) atomic number, and (ii) mass number, of an element? Explain with the help of an example.
(b) What is the relation between the atomic number and mass number of an element?
(c) If an element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element which can form trivalent ion
What are orbits or shells of an atom?
A ______ number describes a specific aspect of an electron.
In a neutral atom number of protons is equal to the number of neutrons.
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
The atomic number of boron is 5. Write the chemical formula of the compound formed when boron reacts with chlorine.
