46. A 4.1-ug sample of cesium-137 yields an activity of 3800 uCi. What is the SI value for this amount of activity? A. 1.0x10 Bq B. 1.6x10 Bq С. 930 Вq D. 141 MBq

Q: 48. What kind of reaction is this: Mg(s) + 2HI(aq) forms Mg12(s) + H2(g) A) single replacement B)…

A:

Q: m.ecollege.com/course.html?courseld=16561285&OpenVellumHMAC=6a7c4d9ab06d9a1e9567e01a4ad1f0ca#10001…

A: a. From the above table, in element a, the total number of electron in the energy level is 3. So,…

Q: 28. Radioactive decay is a process in which an unstable changes energy states and emits radiation.…

A:

Q: 14. In the equation 22890Th 22891Pa + X which particle is represented by X? Accessibility. Good to…

A:

Q: 40 Calculate the number of protons, neutrons, and electrons in Ca. 20

A: The number of protons, neutrons, and electrons in 20 Ca 40 can be calculated as

Q: is not used to make Portland Cement a Calcareous Rocks b. Argillaceous Rocks c. Siliceous d. Sands…

A: 1.  B option is correct. CO2 Carbon dioxide is emitted as a by-product of clinker production, an…

Q: What part of an atom is involved in chemical reactions? A. Proton B. neutron C. outermost electron…

A: 1. c Only the valence electrons take part in the chemical reactions. 2. a A huge amount of energy is…

Q: Describe the formation of heavier elements during stars' formation and evolutions; Give at least 10…

A: Introduction :  An element is a group of atoms which have same number of protons, in pure form they…

Q: Activity type of Alumina (meaning of type I, II, III, etc.) what do the numbers mean?

A: Alumina is a granular and extremely porous form of aluminum oxide. It is available in basic, acidic…

Q: Discuss the importance of identifying Uranium contents and how does it affects the GR reading

A: Uranium is an element which is represented using the symbol 'U'. The atomic number of uranium is 92.…

Q: 11. Mrs. Folloso is preparing water in containers to sell in their water station. A. filtration B.…

A:

Q: . Given 24/14 Si, a) Find the number of protons, electrons and neutrons in the neutral atom.

A:

Q: circles represent helium atoms; the dark circles represent argon atoms. Select one: a. b. d. It is…

A: Applying concept of partial pressure.

Q: What pattern do you notice? What's similar about most of the radioactive elements?

A: There is an obvious pattern to look for: Atomic number increases as you move right along a row.…

Q: 28. Radioactive decay is a process in which an unstable changes energy states and emits radiation.…

A: A material containing and stable nuclei is considered radioactive .Three of the most common type of…

Q: Suppose the electrically charged disks at the end of the cathode-ray tube were replaced with a…

A: The cathode-ray tube is a  tube that has a vacuum inside the tube which when irradiated with a beam…

Q: What was the Copernican revolution? O A. The discovery that the sun was not the center of the…

A: Copernican revolution is about the model of the solar system and was given by a polish astronomer.

Q: I с со I [References] VII Available Electrons: 16

A: Here we have to follow the basuc rule of Lewis dot structure and proceed according to that .

Q: Part A Na Na + Express your answer as a particle or a chemical formula. ΑΣφ ? OA chemical reaction…

A:

Q: 10 8 7 6. 4 3 2 1 1.1ppm d, 6H 3.6ppm septet, 1H M/z 102

A:

Q: Thulium (Tm) is element 69 on the periodic table. A sample contains 8.84×1022 atoms of Tm. Calculate…

A: Given: The atomic number of Thulium (Tm) =69 Number of atoms of Thulium (Tm) = 8.84×1022 atoms Mass…

Q: What is the charge on the electron, the proton, and the neutron, respectively? a.-1, +1, +1 b. -1,…

A: Write charge and mass of electron, proton and neutron ---

Q: How is iodine classified?

A: An atom is mainly composed of three sub-particles; electrons, protons and neutrons. These particles…

Q: When an atom form from its constituent particles a. energy is released b. energy is destroyed d.…

A: In the reaction, Atom can either form from its constituent particles or an atom can disintegrate…

Q: Marie Curie is famous for her study of:  a. hydrogen b. electricity c. radiation d. magnetism

A: Marie Curie was a Chemist and Physicist. She won nobel prize for the discovery of Polonium and…

Q: 86. the symbol for the atomic number is Z the United States has the largest water footprint of…

A: Given:  Q 86 to 95 for True or False Q 96 to 100 for Matching

Q: What is the radium

A: Radium a chemical element with atomic number 88. It is a white radioactive metal used in the…

Q: ron 54 Chemistry/Cor cans used for canning food are usually coated with tin instead of zinc. This is…

A:

Q: Please answer this question correctly. 1. Write the configuration of sulfur after it has achieved…

A:

Q: 2/11 uestion 3 of 9, Step 1 of 1 Correct ones from the skeleton of a fish have lost 75 percent of…

A: Given-> K = 0.000124 year-1

Q: 25. Which determines the speed of a molecule? * a. Its kinetic energy b. The amount of the molecules…

A: Multiple choice questions : 25-28

Q: Skeich. diprem in diatm S-Poocess barth faom 14° Ce Specfy tbe of earch bebacesys (lies neutron > Eo…

A:

Q: What is radioactivity? Indicate whether you agree or disagree with the following statement and…

A: Radioactivity is a physical phenomenon  where an element or isotopes emitting radiation…

Q: Convert the mass of one electron (m=9.10*10^ -31kg) to energy. Recall the speed of light c = 3.00 *…

A: Given that, m=9.10×10-31 Kg  c= 3.00×108 m s-1 Energy E = ?

Q: The vast majority of the ISM, both by volume and by mass, is made up of this element, found at many…

A: ISM means Interstellar medium. It consist of matter and radiation that exist between the spaces of…

Q: CHEM&110 Homework Chapter 1 1. In these diagrams, two different types of atoms are represented by…

A: (1) Any Substance that has mass and occupy volume, and can be sensed by our sense organs, is called…

Q: Magnesium reacts explosively with oxygen to form magnesium oxide. Which is NOT true of this…

A: The incorrect statement among the given has to be given,

Q: jelaskan apa yang dimaksud energi ikat inti dan tentukan energi ikar per nukleon dari inti 87Br35…

A:

Q: 1. Brz 24. 2. NaOEŁ zequiv. Br Br A. B. D. Bv Br Br

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: A student looked up the naturally occurring isotopes of bromine and found the following information:…

A: Atomic mass of an element is the number of times an atom of that element is heavier than an atom of…

Q: Identify element X in 118 x 50- O Te O Sn Pb none of the above

A: Atomic and mass number of given elements are,

Q: 44) Which has the highest sub energy level? a. K b. L c. M d. N

A:

Q: -22 The mass of a certain atom is 2.086 x 10 g. This is the same mass as 2.086 x 10-16 mg. 2.086 x…

A:

Q: fusion began. The fusion of hydrogen atoms in the core of this proto- sun emitted large amount of…

A: Nuclear fusion takes place when two or more less stable lighter nuclei are combined under high…

Q: 28. While synthesizing their ferrofluid a student is short on time and decides to pour 50 mL of…

A: Ferrofluids can defined as the colloids suspensions of magnetic nanoparticles. They tend to…

Q: 나z 43 나4 18 85 a) lep 34 니D 41 do b 니s c) 4d If Ik Il_ 19 d) ap 20 8)

A: Here we have to predict the best orbital notation diagram. Here we have to apply Hund's rule…

Q: what are the properties of cathode rays and anode rays?

A:

Q: Please advise

A: The mass of aluminium present in 0.2785 g of alum is to be determined.

Q: It takes 1.25 kJ of energy to heat a sample of pure silver from 10°C to 12.3 °C. Calculate the mass…

A: The heat capacity is the ratio of the energy supplied in the form of heat to the rise in the…

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.