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Physics
UTME / JAMB 1985
Structure of the Nucleus
Solution
Which of the following features is NOT a characteristic of natural radioactivity?
A
Radioactivity is a nuclear phenomenon
B
Radioactivity is exhibited only by elements of mass number greater than 206
C
The radioactivity of an element is affected by electric and magnetic fields in the surroundings
D
Radioactive substances emits three types of radiations, a-rays, \(\beta\)-rays and y-rays
E
The radioactive element is transformed into a new element
medium Difficulty
Study Explanation
Physics
UTME / JAMB 1985
Structure of the Nucleus
Solution
What is the number of neutrons in the Uranium isotope \(^{238}_{92}X\)?
A
92
B
146
C
238
D
330
E
119
medium Difficulty
Study Explanation
Physics
UTME / JAMB 1980
Structure of the Nucleus
Solution
Which of the following are true of atom?
A
atoms are indestructible
B
all atoms of a pure substance, or elements are identical
C
atoms of different substance have different weights
D
all of the above
E
A and B only
medium Difficulty
Study Explanation