Description : Is the decay of a radioactive isotope predictable (causally determined) or not?
Last Answer : At this point it seems to be a result of quantum indeterminacy. In other words, since the Heisenberg uncertainty principle is in effect at that level, all we can determine is probability (hence a predictable ... , it is deterministic and we will (hopefully) one day be able to understand it as such.
Description : The radioactive isotope of cerium - 137 of weigh 8g was collected on 1st Feb. 2006 kept in a sealed tube. On 1st July, 2006, it was found that only 0.
Last Answer : The radioactive isotope of cerium - 137 of weigh 8g was collected on 1st Feb. 2006 kept in a sealed tube. On ... days B. 30 days C. 25 days D. 50 days
Description : Assertion (A) : Half life of a radioactive isotope is the time required to decrease its mass number by half Reason (R ) : Half life of radioactive iso
Last Answer : Assertion (A) : Half life of a radioactive isotope is the time required to decrease its mass number by half ... . If both (A) and (R ) are incorrect.
Description : (A) The archaeological studies are based on the radioactive decay of carbon-14 isotope. (R ) The ratio of C-14 to C-12 in the animals of plants is the
Last Answer : (A) The archaeological studies are based on the radioactive decay of carbon-14 isotope. (R ) The ratio of C ... D. If both (A) and (R ) are incorrect.
Description : The half life of radioactive isotope is 3 hour. If the initial mass of isotope were 256 g, the mass of it remaining undecayed after 18 hr is a)12 g b)
Last Answer : The half life of radioactive isotope is 3 hour. If the initial mass of isotope were 256 g, the mass of it remaining ... 4 g B. 8 g C. 12 g D. 16 g
Description : When `._(13)^(27)Al` is bombarded whith `alpha`-particles, a radioactive isotope of phosphorus `._(15)^(30)P` with the emission of …. Is formed
Last Answer : When `._(13)^(27)Al` is bombarded whith `alpha`-particles, a radioactive isotope of phosphorus ` ... A. neutrons B. protons C. positrons D. electrons
Description : A radioactive isotope having a half life of 3 days was received after 12 days. It was found that there were 3 gm of the isotopes in the container. The
Last Answer : A radioactive isotope having a half life of 3 days was received after 12 days. It was found that there were 3 gm of ... 48 g B. 36 g C. 24 g D. 12 g
Description : When an isotope is blank it is radioactive?
Last Answer : When an isotope is unstable, it is said to be radioactive.
Description : When does an isotope undergo radioactive decay?
Last Answer : An atom of a given isotope will undergo radioactive decay whenever it feels like it. No joke. The nucleus of a radioactive isotope is unstable. Always. But that atom has no predictable moment ... to decay, except that those with very short half lives will pretty much disappear relatively quickly.
Description : What type of decay involves only the release of high-energy photons and therefore does not change the mass of an atom of a radioactive isotope?
Last Answer : High-energy photons are gamma rays; the decay is called gamma decay. Please note that the mass of an atom DOES change, since a loss of energy is accompanied by a loss in mass.
Description : What name is given to the time taken for half the atoms in a sample of a radioactive isotope to decay?
Last Answer : Half-life
Description : A radioactive isotope labeled cDNA probe is used in (A) Southern blotting (B) Northern blotting (C) Both (A) and (B) (D) None of these
Last Answer : Answer : C
Description : Pick out the wrong statement. (A) α-particle emission from a radioactive element makes it electrically negative (B) β-particle emission from a radioactive element makes it electrically ... ) The disintegration constant of a radioactive isotope is independent of pressure, temperature or concentration
Last Answer : (C) A radioactive element having a half life period of 20 years will completely disintegrated in 40 years
Description : Which one is the radioactive isotope of hydrogen? (A) Deuterium (B) Ortho-hydrogen (C) Tritium (D) None of these
Last Answer : (C) Tritium
Description : A radioactive isotope undergoes decay with respect to time following __________ law. (A) Logarithmic (B) Exponential (C) Linear (D) Inverse square
Last Answer : (B) Exponential
Description : The time required for half of the __________ of a radioactive isotope to decay is called its half life. (A) Nuclei (B) Electrons
Last Answer : (A) Nuclei
Description : The radioactive isotope of hydrogen is called--------- and its nucleus contains --------proton and --- --neutron.
Last Answer : Ans: Tritium, one and two
Description : Radioactive isotope of Uranium used in Nuclear Bomb is ? A.92 U 235 (Answer) B.92 U 234 C. 92 U 233 D. 92 U 238
Last Answer : A.92 U 235 (Answer)
Description : Which technique has helped in investigation of Calvin cycle? (a) X-ray crystallography (b) X-ray technique (c) Radioactive isotope technique (d) Intermittent light
Last Answer : (c) Radioactive isotope technique
Description : A radioactive isotope has a half-life of 10 days. If today there are 125 g of it left, what was its original weight 40 days earlier (a) 600 g (b) 1000 g (c) 1250 g (d) 2000 g
Last Answer : Half life = 10days The formula which is, 1/(2)^n × original weight = Weight left today. To obtain the value of n = divide no of days by half life ie.,n= 40/10= 4 n=4 So, 1/(2)^n × original Weight = 125g 1/(2)^4 × Original weight = 125 Original weight = 16×125 = 2000g
Description : Pheochromocytomas are tumours of (A) Adrenal cortex (B) Adrenal medulla (C) Pancreas (D) Bone
Last Answer : Answer : B
Description : For limiting cerebral edema due to brain tumour, the preferred corticosteroids are betamenthasone/dexamethasone because (a) They do not cause Na+ and water retention (b) They are more potent (c) They can be administered intravenously (d) They inhibit brain tumours
Last Answer : Ans: A
Description : Which of the following finding is most important for grading of tumours? C A. Presence of tumour cells in the vascular spaces B. Level of invasion C. Microscopic pleomorphism of nuclei and the number of mitoses D. degree of metastasis
Last Answer : Microscopic pleomorphism of nuclei and the number of mitoses
Description : Benign tumours arising from the salivary gland epithelium are called B A. Transitional cell epitheliomas B. Adenomas C. Fibromas D. adenocarcinoma
Last Answer : Adenoma
Description : Which one of the following statements is correct? (a) Benign tumours show the property of metastasis. (b) Heroin accelerates body functions. (c) Malignant tumours may exhibit metastasis. (d) Patients who have undergone surgery are given cannabinoids to relieve pain.
Last Answer : (c) Malignant tumours may exhibit metastasis
Description : Carcinoma refers to (a) malignant tumours of the connective tissue (b) malignant tumours of the skin or mucous membrane (c) malignant tumours of the colon (d) benign tumours of the connective tissue.
Last Answer : (b) malignant tumours of the skin or mucous membrane
Description : The most common characteristic symptom of malignant tumours occurring in lower jaw is, A. Pain B. Bleeding C. Paraesthesia
Last Answer : C. Paraesthesia
Description : What is true of thalidomide: A. It exerts antitumour activity in some solid malignant tumours B. It ameliorates cancer associated cachexia C. It exerts antileprotic action D. All of the above
Last Answer : B. It ameliorates cancer associated cachexia
Description : For limiting cerebral edema due to brain tumour, the preferred corticosteroids are betamethasone/dexamethasone because: A. They do not cause Na+ and water retention B. They are more potent C. They can be administered intravenously D. They inhibit brain tumours
Last Answer : A. They do not cause Na+ and water retention
Description : What is the difference between an isotope and an ion?
Last Answer : A: An isotope is an atom of an element with a different number of neutrons, while an ion is an atom or molecule with a net electrical charge due to the loss or gain of one or more electrons.
Description : The isotope deuterium of hydrogen has : -Science
Last Answer : Hydrogen has no neutron, deuterium has one, and tritium has two neutrons. The isotopes of hydrogen have, respectively, mass numbers of one, two, and three.
Description : Which isotope of uranium capable of sustaining chain reactions? -Do You Know?
Last Answer : answer:
Description : How many protons will remain when cobalt isotope with atomic number 27 losses 3 electrons?
Last Answer : 110 to 114
Description : What is the half-life of carbon 12 isotope ?
Last Answer : Carbon -12 is a normal atom. It is not radioactive. C- 14 is radioactive. Its half -life is 5,630 years
Description : Which isotope is used in the treatment of leukemia ?
Last Answer : Phosphate of phosphorus 32 is used in the treatment of leukemia .
Description : Which Isotope Destroys Cancer Cells ?
Last Answer : : The isotope cobalt _60 destroys cancer cells.
Description : What is the difference between isotope and isobar ?
Last Answer : Isotopes are different forms of the same atom , so that the mass numbers are different. And isobars are atoms of different elements with the same mass. So isotopes will have many similarities in basic properties , but there may be no similarities between isobars.
Description : What is the isotope of chlorine ?
Last Answer : : The number of isotopes of chloris is 2
Description : What are the properties of isotope ?
Last Answer : It has the same atomic number but different neutron and mass numbers.
Last Answer : Radioisotope is used in goiter
Last Answer : Atoms that have the same number of protons but different numbers of masses and neutrons are called isotopes of each other.
Description : The isotope of carbon used extensively for studies in photosynthesis is
Last Answer : The isotope of carbon used extensively for studies in photosynthesis is A. `C^(13)` B. `C^(14)` C. `C^(15)` D. `C^(16)`
Description : The `t_(1//2)` of a radionuclide is 8 hours. Starting with 40 g of the isotope, the amount in gm remainig after one day will be:
Last Answer : The `t_(1//2)` of a radionuclide is 8 hours. Starting with 40 g of the isotope, the amount in gm remainig after one day will be:
Description : A photon of gamma radiation knocks out a proton from `""_(12)Mg""^(24)` nucleus to form a)The isotope of parent nucleus b)The isobar of parent nucleus
Last Answer : A photon of gamma radiation knocks out a proton from `""_(12)Mg""^(24)` nucleus to form a)The isotope of ... )Na` D. the isobar of `._(11)^(23)Na`
Description : `._(13)Al^(27)` is a stable isotope. `._(13)Al^(29)` is expected to disintegrate by
Last Answer : `._(13)Al^(27)` is a stable isotope. `._(13)Al^(29)` is expected to disintegrate by A. ... B. `beta`-emission C. positron emission D. proton emission
Description : The `.^(60)C` isotope decays with a half life of 5.3 years. How long would it take for 7/8 of a sample of 500 mg of `.^(60)Co` to disintegrate?
Last Answer : The `.^(60)C` isotope decays with a half life of 5.3 years. How long would it take for 7/8 of a sample ... B. 15.9 years C. 10.6 years D. 5.3 years
Description : The isotope `._(92)^(235)U` decays in a number of steps to an isotope of `._(82)^(207)Pb`. The groups of particle emitted in this process will be:
Last Answer : The isotope `._(92)^(235)U` decays in a number of steps to an isotope of `._(82)^(207)Pb`. The groups ... C. `7 alpha, 4 beta` D. `10 alpha, 8 beta`
Description : The unstable isotope of hydrogen is …..
Last Answer : The unstable isotope of hydrogen is ….. a. H-1 b. H-2 c. H-3 d. H-4
Description : What isotope has 12 protons and 13 neutrons?
Last Answer : Need answer
Description : If an isotope of silicon has 15 neutrons what is the mass number?