Related Questions

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:)
A A. an α particle
B a positron
C an electron
D a proton
. 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:)
A an a particle
B a positrom
C an electron
D a proton
Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same
A Period increases
B Period decreases
C Group increases
D Both 'B' & 'C'
The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and difference of the digits of the number if the ratio between the digits the number is 1 : 2?
A 4
B 8
C 16
D 24
The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called
A Humidity ratio
B Relative humidity
C Absolute humidity
D Degree of saturation
The transuranium elements are the chemical elements with atomic numbers greater than
A 86
B 89
C 92
D 96
The difference between the radio of bigger difference between circle and smaller circle is 14 and the difference between their sareas is 1056 cm2 . Radius of the smaller circle is .
A 7 cm
B 5 cm
C 9 cm
D 3 cm
Which one of the following elements has the lowest atomic mass?
A Lithium
B Nitrogen
C Hydrogen
D Helium
Nuclides having the same atomic numbers are termed as
A Isotopes
B Isomers
C Isotones
D Isobars
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?
A Z
B A
C A+Z
D A-Z

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