Isotopes, Isobars, and Isotones: MCQ Test (25 questions)

Question 1 of 25

In what properties do two isotopes of an element differ?

Aneutron number and mass number
BNeutron number and atomic number
CProton number and electron number
DAtomic mass and atomic number

Question 2 of 25

Isotones are ____

Asame number of protons
Bsame number of neutrons
Cthe same number of nucleons
DNone of these

Question 3 of 25

With what is Al¹³+ is isoelectronic?

ACI
BAl
CS
DF

Question 4 of 25

Two atoms are called isotopes if

AThey have the same number of neutrons but different mass numbers.
BThey have the same atomic number but different mass numbers.
CThey have the same sum of protons and neutrons, but different numbers of protons.
DThey have the same number of neutrons but different radioactive moment modes.

Question 5 of 25

Which of the following pairs represents isoelectronic ions?

ANa+, K+
BK, Mg²+
CMg²+,Ca²+
DCa²+, S²

Question 6 of 25

An isotope of an atomic nucleus is that which has ____

AThe number of neutrons is the same, but the number of protons is different.
BThe number of protons is the same, but the number of neutrons is different.
CThe number of protons and neutrons is the same
DBoth protons and neutrons have different numbers.

Question 7 of 25

Which isotopes are found in the largest number?

AUranium
BHydrogen
CCesium
DLed

Question 8 of 25

¹⁵ P³¹ and ¹⁴Si³⁰ are

AIsotopic
Bisothermal
Cisoelectronic
DSamnetronic

Question 9 of 25

The difference between isotopes of an element is due to the presence of different numbers of

AProton
BNeutron
Celectron
Dphoton

Question 10 of 25

Which radioisotope is used to control blood cancer (leukemia)?

APhosphorus-32
BCobalt-60
CIodine 131
DSodium 24

Question 11 of 25

What do you call ⁸0¹⁶, ⁸0¹⁷ and ⁸0¹⁸?

AIsotopic
BIsocomponents
CEquilibrium
DSamnetronic

Question 12 of 25

The isotonic group in the following is-

A⁶C¹²,⁷N¹⁴,⁸O¹⁶
B⁶C¹²,⁷N¹⁴,⁸O¹⁸
C⁶C¹²,⁷N¹⁵,⁸O¹⁶
D⁶C¹⁴,⁷N¹⁵,⁸O¹⁶

Question 13 of 25

What are ³⁶Kr ⁸⁶ and ³⁷Rb ⁸⁷ called?

Aisoelectronic
Bisothermal
CSamnetronic
DIsotopic

Question 14 of 25

What are ¹⁷CI³⁵ and ¹⁷CI ³⁷?

ACompound
BIsotopic
Chomogeneous
Disothermal

Question 15 of 25

Isobars are produced by the emission of which of the following?

Aalpha rays
Bbeta rays
CGamma rays
DX-rays

Question 16 of 25

¹⁸Ar⁴⁰, ¹⁹K ⁴⁰ and ²⁰ Ca ⁴⁰ are_

Aisoelectronic
Bisothermal
CSamnetronic
DIsotopic

Question 17 of 25

Which of the following is not an isotope of hydrogen?

AProtium
BDeuterium
CTritium
DTransium

Question 18 of 25

Isotopes have _______ 1. Similar physical properties and different chemical properties. 2. Different physical properties. 3. Similar chemical properties Code:

A1 and 2 only
B1 and 3 only
C2 and 3 only
D1, 2 and 3 all

Question 19 of 25

The number of isotopes of caesium is_

A15
B17
C23
D36

Question 20 of 25

What is the number of isotopes of hydrogen?

A2
B3
C4
D5

Question 21 of 25

Match List-I with List-II and select the correct answer from the codes given below the lists. List-I (Radioisotopes) List-II (Diagnostic uses) A. Arsenic-74 1. Hyperactivity of thyroid gland B. Cobalt-60 2. Blood disorders C. Iodine 131 3. Tumor D. Sodium 24 4. Cancer Code:

AABCD
BABCD
CABCD 3 4 1 2
DABCD 4 3 2 1

Question 22 of 25

Which isotope is used in radioactive dating to determine the age of rocks?

AUranium
BLutonium
CThorium
DCarbon

Question 23 of 25

Ions that have the same number of electrons are called ____.

AIsotopic
Bisothermal
CSamnetronic
DSamnetronic

Question 24 of 25

The radioactive isotope of hydrogen is called ____.

ADeuterium
BProtium
CRadium
DTritium

Question 25 of 25

Which isotope is used to detect the condition of blood clots in the circulatory system?

AOn-2
BCo-60
CAs-74
DI-131