Elements which have same number of protons but different number of neutrons are called as _________ ?

A. Isotopes
B. Isomers
C. Allotropes
D. Allomers

Submitted by: Rashid Mehmood

Atoms which have the same number of protons but different numbers of neutrons in the nucleus are known as isotopes. Because of the difference in the number of neutrons, they will have the same atomic number, but varying atomic mass (or mass number).

Related Mcqs:

The protons and neutrons are found in the center of the atom, which is called the _________of the atom?
A. Nucleus
B. Headquarters
C. Hub
D. None of These
In an atomic nucleus, neutrons and protons are held together by: ___________?
A. Gravitational forces
B. Exchange forces
C. Coulombic forces
D. Magnetic forces

Submitted by: Engr Allah Wadhayo
Charge carriers in a metal are electrons rather than protons because electrons are?
A. Smaller
B. Negative
C. Loosely bound
D. All of the above

Submitted by: Malik Asghar Hussain
Elements are made of _________?
A. Atoms
B. Molecules
C. H2O
D. Compounds
Which one of the following elements the drum of a Photostat machine is made up of: _________?
A. Aluminium
B. Selenium
C. Barium
D. None of these

Submitted by: Abid Hussain
The three elements needed for healthy growth of plants are __________?
A. N, P, K
B. N, C, P
C. N, K,
D. N, S, P
Laughing gas has chemical composition of following two elements ?
A. Nitrogen + Hydrogen
B. Nitrogen + Carbon
C. Nitrogen + Oxygen
D. Oxygen + Carbon
E. None of these
How many elements are in Modern periodic table?
A. 112
B. 118
C. 114
D. 116

Submitted by: M.Muzammil
How many elements are in modern periodic table?
A. 118
B. 181
C. 108
D. 188

Submitted by: M.Muzammil
The two elements that are frequently used for making transistors are :
A. Boron and aluminium
B. Silicon and Germanium
C. Iridium and Tungston
D. None of these

Submitted by: Fahad Mehsud