Advertisements
Advertisements
प्रश्न
Write down the mass number of the atom having 20 neutrons and 15 protons.
Advertisements
उत्तर
Mass number (A) = Neutrons (n) + Protons (p)
Mass number = 20 + 15 = 35
APPEARS IN
संबंधित प्रश्न
An element with mass number 81 contains 31.7% more neutrons as compared to protons. Assign the atomic symbol.
An ion with mass number 56 contains 3 units of positive charge and 30.4% more neutrons than electrons. Assign the symbol to this ion.
How many atoms are present in one gram atomic mass of a substance ?
Define atomic mass of an element.
What is meant by atomic mass number?
Choose the correct answer from the option given below.
Modern atomic symbols are based on the method proposed by
Ordinary chlorine gas has two isotopes \[\ce{^35_17Cl}\] and \[\ce{^37_17Cl}\] in the ratio of 3 : 1. Calculate the relative atomic mass of chlorine.
What would be the reason for an element to have atoms with different mass numbers?
Give a reason for the following:
The mass number of an atom is slightly less than the actual atomic mass.
Which of the following has the smallest mass?
Mass of 1 mole of Nitrogen atom is ______
The sum of the numbers of protons and neutrons of an atom is called its ______
Relative atomic mass is otherwise known as ______.
The gram atomic mass of an element has no unit.
Calculate the % of each element in calcium carbonate. (Atomic mass: C-12, O-16, Ca -40)
One electron is present in the outermost shell of the atom of an element X. What would be the nature and value of charge on the ion formed if this electron is removed from the outermost shell?
What are the postulates of Bohr’s model of an atom?
If the atomic mass unit ‘u’ were defined to be `1/5 "th"` of the mass of an atom of C-12, what would be the atomic weight of nitrogen in amu or ‘u’ in this state? Atomic weight of N on the conventional scale is 14.
