Question
Which of the following is an alpha particle which is
emitted in radioactivity?Solution
Alpha particle consists of a helium atom having 2 electrons, 2 protons and 2 neutrons. Radioactive decay (also known as nuclear decay or radioactivity) is the process by which an unstable atomic nucleus loses energy by emitting radiation, such as an alpha particle, beta particle with neutrino. A material containing such unstable nuclei is considered radioactive Hence, option A is correct.
Which element is exactly in the middle of the fourth consonant from the left end and sixth number from the right end?
How many letters are there between the first letter of second word from the left end and second letter of second word from the right end in alphabetical...
All the words arranged as per the dictionary order then which of the following words is third from the right end?
Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
W _ _ Y _ D...
 If all the letters in the word ‘LEAVING’ are arranged in alphabetical order from left to right such that the vowels are arranged first followed by...
In the given arrangement, how many symbols are between 3rd letter from the right end and 11th element from the left end?
What will come in place of question mark(?) in the following series?
BI           JC           DK         LE �...
How many such symbols are there which is preceded by numbers and followed by vowels?
- How many such consonants are there in the above arrangement each of which is immediately followed by a consonant and immediately preceded by a symbol?
Select the number from among the given option that can replace the question mark (?) in the following series.
17, 18, 22, 31, 47, 72, ?
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