An isotopes of `_(50)^(112)Sn` contains 68 neutorns. What will be its mass number?

An atom of element E contains 3 protons, 3 electrons and 4 neutrons : (b) What is its mass number ?

If weight of an object is 49 N then what will be its mass ?

The atom of an element is made up of 4 protons, 5 neutrons and 4 electrons. What are its atomic number and mass number ?

An atom of element E contains 3 protons, 3 electrons and 4 neutrons : (a) What is its atomic number ?

Give the important isotopes of hydrogen,carbon, oxygen and chlorine. Indicate their mass numbers and atomic numbers

What is Reynolds number? What is its importance?

The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it ? What is the atomic number of the element ?

The mass number of an element is 23 and it contains 11 electrons. What is the number of protons and neutrons in it ? What is the atomic number of the element ?

B has two isotopes 10B (19%) and 11B( 81%) . What is the atomic mass of B .