Question

Which of the following statement is false regarding isotopes?

• A. They are atoms of same element having same number of protons and electrons but different number of neutrons.
• B. Isotopes of an element have similar chemical perperties but different physical properties.
• C. All the isotopes of an element have same number of valence electrons.
• D. The three isotopes of hydrogen (protium, deuterium and tritium) contain one, two and three neutrons, respectively.

Answer 1

The correct option is D The three isotopes of hydrogen (protium, deuterium and tritium) contain one, two and three neutrons, respectively.

Isotopes which are having same number and there by arrangement of electrons on the isotopes which undergo same chemical reaction but there is only variations in the mass.

Different isotopes of an element have the same atomic number , but different mass numbers. Thats because each isotope of an element contains different numbers of neutrons.

The chemical properties of an element are determined by its electronic structure. Because isotopes have the same number and therfore arrangements of electrons , isotopes of an element undergo the same chemical reaction. The only difference is their mass.

Isotopes are sometimes shown by the name of the element. followed by the mass number. Thus the three isotopes of hydrogen would be

Hydrogen-1

Hydrogen-2

Hydrogen -3