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What will be the atomic number and mass of product element B respectively if an atomic number and atomic mass of element A is 92 and 238 respectively? A → B + 22He4
অ্যালুমিনিয়াম, হিলিয়াম এবং সিলিকনের পারমাণবিক সংখ্যা যথাক্রমে 13, 2 এবং 14 হলে, Al27+He27→Si27+( ) নিউক্লিয়ার বিক্রিয়াতে অনুপস্থিত কণা কোনটি? (Aluminum has atomic number 13, helium has atomic number 2, and silicon has atomic number 14. In the nuclear reaction the missing particle Al27+He27→Si27+( ) is:)
. অ্যালুমিনিয়াম, হিলিয়াম এবং সিলিকনের পারমাণবিক সংখ্যা যথাক্রমে 13, 2 এবং 14 হলে, Al27+He27→Si27+ নিউক্লিয়ার বিক্রিয়াতে অনুপস্থিত কণা কোনটি ? (Aluminum has atomic number 13, helium has atomic number 2, and silicon has atomic number 14. In the nuclear reaction Al27+He27→Si27+ the missing particle is:)
An element 'X' having atomic number 20 combines chemically without another element 'Y' having atomic number 8 to form a compound 'Z'. Which of the following statements are correct about the compound 'Z'? (i) The formula of 'Z' is XY2.  (ii) Melting point of 'Z' is very high.  (iii) Molten form of 'Z' does not conduct electricity.  (iv) 'Z' is soluble in water but insoluble in petrol. 
The atomic weight and atomic number of an element are A and Z respectively. What is the number of neutrons in the atom of that element?
The radiation absorbed by elements of low atomic number is lower than that absorbed by elements of high atomic number. This variation of absorption co-efficient with atomic number can be very well applied to
Which of the following statements is/are correct? 1. The atoms of an element having the same atomic number but a different mass number are called isotopes. 2. The nuclei which have the same mass number but a different atomic number are called isobars.
There are two rows, each containing 3 numbers. Below are some rules to be used to get the resultant number for each row separately. Use the rule from left to right for each row and find the answer to the question. Rule: 1. If an even number is followed by an even number, then the first number will be subtracted from the second. 2. If an odd number is followed by an odd number, then both will be added. 3. If an odd number is followed by an even number, then the even number will be subtracted from the square of the odd number. 4. If an even number is followed by an odd number, then the odd number will be subtracted from the even number. Row I: 9,11, 34 Row II: 16, 9, 8 What is the difference between the resultant numbers in the first row and the second row
Which law states that when elements are arranged in the order of increasing atomic masses, the atomic mass of the middle element of the triad is approximately the average of the atomic masses of the other two elements?
When the elements are arranged in increasing order of atomic weights, the atomic weight of the middle element is approximately the average of the atomic weights of the other two elements' - this rule is known as-