Isotopes, Isotones and Isobars

Q.

What is 92 on the periodic table?

Q.

Why is Iron 56 considered the most stable nucleus?

Q.

What are isobars? Give example.

Q.

Explain the isotopes of chlorine.

Q.

What are the isotopes of carbon ? Give their symbols.

Q.

Number of neutrons present in Hydrogen atom is:

1. $0$

2. $1$

3. $2$

4. $3$

Q.

The isotopes of elements with the atomic number more than 82 are said to be radioisotopes.

1. True

2. False

Q. Which of the following is/are isotones?

1. $146C$ and $147N$
2. $2311\mathrm{Na}$ and $2412\mathrm{Mg}$
3. $4020\mathrm{Ca}$ and $3919K$
4. $3818\mathrm{Ar}$ and $3517\mathrm{Cl}$

Q. is also known as heavy hydrogen.

1. Deuterium
2. Tritium
3. Protium

Q.

Which isotope of hydrogen is used in making heavy water?

1. Protium

2. Deuterium

3. Tritium

4. Both B and C

Q.

Give three points of distinction between isotopes and isobars.

Q.

Which of the following boxes contains isotones? (Numbers in the box represents mass number)

1. Box A

2. Box B

3. Box C

4. Box B and Box C

Q.

Give an example of isobars.

Q. Match the following with their correct characteristics.

1. Same A
2. Same (A - Z)
3. Same Z

Q. The number of neutrons present in a $2713\mathrm{Al}$ atom are:

1. 14

Q.

The atom of an element has $20$ protons, $20$ neu­trons, and $20$ electrons. Find out the name of the element

Q.

Which diagram represents an atom of $32\mathrm{He}$?

1. Only 2
2. Both 1 and 2
3. None of the above
4. Only 1

Q.

Explain isobars with example.

Q. (a) Why do isotopes have same chemical properties?
(b) Why do isobars have different chemical properties?
[3 MARKS]

Q.

Specify a stable isotope of an element where all subatomic particles are present in even numbers.

Q. Match the given pair of elements with the corresponding relation between them.

1. Isobars
2. Isotones
3. Isotopes

Q. Two of the isotopes of carbon, $136C$ and $146C$ have different number of electrons.

1. False
2. True

Q.

Complete the chart:

Name of the element	Symbol of the element	Atomic number	Mass number	No. of protons	No. of electrons	No. of neutrons	Electronic configuration
Chlorine		17	35			18	K = 2	L = 8	M = 7

Q.

16. _____is a radioactive inert gas.

Q. Atoms having the same mass number but different atomic number are called:

1. Isobars
2. Isotopes
3. Isomers
4. Isotones

Q. Nuclei with the same number of protons but a different number of neutrons are called isobars.

1. True
2. False

Q. have the same chemical properties, whereas have different chemical properties.

1. Isobars
2. Isotopes
3. Electrons
4. Protons

Q.

Statement:1 - Isotopes have the same chemical properties.
Statement:2 - Isobars have different chemical properties.

1. Both Statement:1 and Statement:2 are false

2. Both Statement:1 and Statement:2 are true

3. Only Statement:1 is true

4. Only Statement:2 is true

Q. Nuclei with the same number of neutrons but a different number of protons are called isotones.

1. False
2. True