Advertisements
Advertisements
Question
Complete the following statements :
Isotopes have different mass numbers because their nuclei contain different number of ............
Some boron atoms have mass number 10 and some have mass number 11. These boron atoms with different mass numbers are called .............
Solution
Isotopes have different mass numbers because their nuclei contain different number of neutrons.
Some boron atoms have mass number 10 and some have mass number 11. These boron atoms with different mass numbers are called isotopes.
APPEARS IN
RELATED QUESTIONS
Name the Radioactive Isotope Which is Used in the Treatment of Cancer.
What name is given to those atoms which contain the same number of protons and electrons but different number of neutrons?
What is the relationship between an atom containing 11 protons, 11 electrons and 11 neutrons, and another atom containing 11 protons, 11 electrons and 12 neutrons?
(a) What are isotopes ? Explain by giving an example.
(b) Give one similarity and one difference between a pair of isotopes.
(c) Give the number of protons, neutrons and electrons per atom in the two isotopes of chlorine `""_17^35"Cl"` and `""_17^35"Cl"`.
The radioactive isotope used in the treatment of cancer is :
In a sample of ethyl ethanoate (CH3COOC2H5), the two oxygen atoms have the same number of electrons but different number of neutrons. Which of the following is the correct reason for it ?
Which of the following pairs are isotopes ? Give reasons for your choice :
(i) `""_26^58"A"`, `""_28^58"B"` or (ii) `""_35^79"X"`, `""_35^80"Y"`
The composition of two atomic particles is given below :
| X | Y | |
| Protons : | 8 | 8 |
| Neutrons : | 8 | 9 |
| Electrons : | 8 | 8 |
(i) What is the mass number of X ?
(ii) What is the mass number of Y ?
(iii) What is the relation between X and Y ?
(iv) Which element/elements do they represent ?
What are isotopes? With reference to which fundamental particle do isotopes differ? Give two uses of isotopes.
Explain radioactive decay and radioactive isotopes.
