A nuclide is represented by \(_{32}^{70}B\). Determine its neutron-proton ratio
0.5
0.8
1.2
1.5
Correct answer is C
The element B has a mass number of 70 with atomic number 32. Hence, B has 32 protons and (70-32) = 38 neutrons.
The neutron- proton ratio is 38:32 = \(\frac{38}{32} = 1.1875\)
\(\approxeq 1.2\)
In which of the following fields is radioisotopes not used?
Medicine
Oil industry
Agriculture
Weather forecast
Correct answer is D
No explanation has been provided for this answer.
Which of the following radiations has the longest wavelength?
Gamma ray
Radio wave
Infrared ray
X-ray
Correct answer is B
Radio wave has the longest wavelength and shortest frequency.
I, II and IV only
I, III and IV only
III and IV only
I and II only
Correct answer is A
No explanation has been provided for this answer.
Which of the following is emitted in a process of natural radioactivity?
\(\alpha\)- particles and \(\beta\)- particles
\(\alpha\)- particles and X-rays
\(\beta\)- particles and X-rays
\(\lambda\)- rays and X-rays
Correct answer is A
In the course of natural radioactivity, alpha, beta and gamma rays are emitted.