673 questions
21
atomic stucture
Easy
+1.0
-0.33
The Nucleus of helium has -
22
atomic stucture
Easy
+1.0
-0.33
Which of the following elements does not contain neutrons ?
23
atomic stucture
Easy
+1.0
-0.33
Which of the following caries a negative charge ?
24
atomic stucture
Easy
+1.0
-0.33
Which among the following is a positively charged particle emitted by a radioactive element ?
25
atomic stucture
Easy
+1.0
-0.33
In an atom, the order of filling up of the orbitals is governed by -
26
atomic stucture
Easy
+1.0
-0.33
Regarding the atom of a chemical element, the magnetic quantum number refers to
27
atomic stucture
Easy
+1.0
-0.33
The number of electrons and neutrons in an element is 18 and 20 respectively. Its mass number is
28
atomic stucture
Easy
+1.0
-0.33
What is the mass number of an element, the atom of which contains two protons, two neutrons and two electrons
29
atomic stucture
Easy
+1.0
-0.33
The mass number of a nucleus is
30
atomic stucture
Easy
+1.0
-0.33
The number of neutrons in the nucleus of plutonium nuclide (94Pu242) is