Chapter 4, Problem 17STP

Interpretation Introduction

Interpretation:

To indicate whether Statement I and Statement II are true or false.

Concept introduction:

Boron is an element which belongs to group 13 in the periodic table. The outermost electrons has 3 electrons thus, it can form B³+ ion. The atomic number of boron is 5.

Answer to Problem 17STP

Statement I and Statement II are true and statement II is a correct explanation of Statement I.

Explanation of Solution

Reason for true statements: The atomic number of Boron is 5. The given figure shows Boron-10 and Boron-11 that are the main isotopes of Boron, thus statement-1 is true. Isotopes have the same number of protons but different number of neutrons, thus statement II is also true.

Boron 10 and Boron-11 are the isotopes of Boron-5, where 10 and 11 are the atomic masses of the isotopes. Both Boron-10 and Boron-11 have 5-5 protons but Boron-10 has 5 neutrons and Boron-11 has 6 neutrons.

Conclusion

Both the statements are true and statement II is the correct explanation for statement I.