Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.
Which of the following equations represents beta decay?
\(\frac{14}{7}\)N + \(\frac{4}{2}\)He → \(\frac{8}{17}\)O + \(\frac{1}{1}\)H
\(\frac{8238}{92}\)U → \(\frac{234}{90}\)Th + \(\frac{4}{2}\)He
\(\frac{8238}{92}\)U → \(\frac{239}{93}\)Np + \(\frac{0}{-1}\)e
\(\frac{13}{7}\)N + \(\frac{4}{2}\)He → \(\frac{16}{8}\)O + \(\frac{1}{1}\)H
Correct answer is C
No explanation has been provided for this answer.
2He
10Ne
18Ar
36Kr
Correct answer is B
No explanation has been provided for this answer.
atomic number 17
atomic number 18
mass number 35
mass number 52
Correct answer is A
No explanation has been provided for this answer.
An important medical use of nuclear radiations is
activation analysis
carbon dating
radiotherapy
tissue regeneration
Correct answer is C
No explanation has been provided for this answer.
The electron configuration of carbon atom in its excited state is [ 6C]
1s22s 22px12py 1
1s 2 2s 22px 22pyo
1s12s22px12py12pz1
1s 22s12px12py12pz1
Correct answer is D
No explanation has been provided for this answer.