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प्रश्न
Fill in the blank
An ion which has a positive charge is called a ..................
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उत्तर
An ion which has a positive charge is called a cation .
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संबंधित प्रश्न
What are the atomic numbers of elements whose outermost electrons is represented by 2p3.
FILL IN THE BLANK
Rutherford won the Nobel Prize in 1908 for his investigations in the field of ......................
(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?
From the symbol `""_2^4"He"` for the element helium, write down the mass number and the atomic number of the element.
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element with four shells
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element with 6 valence electrons
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Isotopes of hydrogen [11H, 21H, 31H]
Show diagrammatically the electron distributions in a sodium atom and a sodium ion and also give their atomic number.
If element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?
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.
