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.
(2500 ÷ √625) × √(42.25) = ? ÷ 4
1540 ÷ 7 - 184 ÷ 8 = ?
(1520 - 1350) ÷ (550 – 500) = ?
Find the value of ‘x’ if (5 × 196 – 340 ÷ 17) ÷ 20 = √1600 – x.
300% of (3341 – 471) = ? × (√4225/195)
- What will come in the place of question mark (?) in the given expression?
(198/13) X (52/11) - ? ÷ 5 = 13 + 68 ÷ 4 What will come in the place of question mark (?) in the given expression?
(16 × 22 + 23) ÷ 15 + 24 = ?2 – 16 × 2
What will come in place of ‘?’ in the given expression :Â
? – (22 × 25 + 70% of 160) = 272
? (1/2) = 236 – 25 × 18/2 + 396 ÷ 22
6612 ÷ 19 - ?% of 240 = -2196
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