CHEM 418 quiz 2 2024

Beta particles are identical to ___________.

The radioactive isotope carbon-14 is used for radiocarbon dating. The half-life of carbon-14 is 5.730 x 10 years. A wooden artifact in a museum has a C count that is 0.125 times that found in living organisms. Estimate the age of the artifact. Age = years %3D Submit Answer Retry Entire Group 9 more group attempts remaining. Previous Next Save and Ex

____________________________ is the penetrating rays and particles emitted by a radioactive source.     transmutation nuclear chemistry radioisotopes radiation

Nuclear energy is power plants is created via __________________. a. fusion of electrons b. extraction of energy from the nucleus of cells c. bombarding radioactive elements with electrons d. fission of uranium atoms by bombarding them with neutrons

Cuántos hidrógenos alfa tiene el siguiente compuesto? A 9 B 12 © C) 4 D 8 E 3 0

MINI TASK #1 Research on Hydrogen isotopes and their applications. Submit a written report.

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Name: Course/Year/Sec Instructor/Professor Group No: Date Performed: Date Submitted: Activity No. 4 CHANGES IN MATTER OBSERVATION / DISCUSSION: A. Physical and Chemical Changes Process 1. heating naphthalene Observations Type of Change Explanation 2. heating iodine 3. iron filings + HCI 4. heating copper sulfate 5. silver nitrate + sodium chloride 6. igniting magnesium ribbon 24

2. Radioactive cobalt-60 is used extensively in nuclear medicine as a y-ray source. It is made by a neutron capture reaction from cobalt-59 and is a B-emitter; B emission is accompanied by strong y radiation. If the half-life of Co-60 is 5.27 years: a. How long will it take for the Co-60 source to decrease to one-eighth of its original amount?

Laboratory 1: Radioactive Decay Lab Table 1 Number of Un- Number of Number of Half- Total Time Passed decayed Atoms of Decayed atoms of M&Miums lives (seconds) M&Miums (number of shake rounds) O seconds X = 46 10 seconds 30 16 First 10 s + Second 10 s = 2 20 seconds 3 30 16 4 40 13 50 4 60 7 3 70 8. 80 9. 40 10 100 Analysis 1. Plot graph the number of un-decayed atoms vs. half-life for M&M atoms using graph paper. 2. Calculate the fraction of the atoms had not decayed at the second end half-lives.

Radiation can be used to__________.     provide electricity     sterilize the surface of meats, fruits and vegetables     diagnose certain diseases     kill cancer     all of the above

SS C cm 1 GtG tC FCX in SH U njmpLGQQmzAe4FI77iAeY/edit#slide%-id.g112e600b836_0_44 个 Help Accessibility Last edit was 2 hours ago Arial 21 BIUA work Day 1- 18 What were some potential human errors that could have occurred when calculating the mass before and after the reaction? Add these to your drawing on page 60.

Engaging ActivitiesACTIVITY 1Directions: Identify the element described in each statement.___________1. An element with 26 protons and 30 neutrons.___________2. Has a mass number of 11 and an atomic number of 5.___________3. Has 117 neutrons and an atomic number of 78.___________4. Has 69 neutrons and 50 protons.___________5. Has 125 neutrons and an atomic number of 85.

Find the radius of a Pu nucleus. Pu is a manufactured nuclide that is used as a power source on some space probes. (answer in fm)

Which of the following questions would not be of scientific importance? Note: there is more than one correct answer here. a. Does fracking affect the frequency of severe earthquakes? b. What was the best album of 2022? C. What were the radiation levels of the Three Mile Island meltdown? d. Who is the fastest-The Flash, Quicksilver or Sonic the Hedgehog? e. Is there a possible vaccine for RSV?

Try Again Your answer is wrong. In addition to checking your math, check that you used the right data and DID NOT round any intermediate calculations. A certain drug has a half-life in the body of 3.5 h. Suppose a patient takes one 300. mg pill at 7:00PM and another identical pill 45 min later. Calculate the amount of drug left in his body at 10:00PM. Be sure your answer has a unit symbol, if necessary, and round it to 3 significant digits. 559. mg x10 X

i need help solving questions 32 - 36 thank youu

answer asap

#33

1

Balance the following:                                 10 +10β + 1844X à ___ 24α + 3 -10β + 2124 Y     A. 5   B. 6   C. 10   D. 8   E. 4

Collision of matter with its corresponding anti-matter produces ___________. neutrons gamma rays beta postive particles protons electrons

Question 3 please

QUESTION 10 Complete the following reactions by identifying the missing nuclear symbols. You may type your answer as a ratio: A/Z X I Be + ? 1층C + an 6. AI + ? P + n 27 13A/ + ? 15 27 13 4 1N + a ? + }H QUESTION 11 What are the products of a neutralization reaction? Click Save and Submit to save and submit. Click Save All Answers to save all answers. 1 search 17

Q/Answer the following 1-An unstable nucleus that has an atomic number that is much larger than 92 decay by emitting an alpha particle * (True /False)

altérnative universe below to answer the questions{ Key Symbol 1A 2A 8A ЗА Atomic 1 C 1 Number W Zy 4A 5A 6A 4. ZA G K V M 7 8 Ad 10 11 12 13 14 15 Ac Ab Ах H. 23 16 17 18 19 20 21 22 Y R 24 25 26 B 27 28 29 30 31 1. If you have 36 moles of R, how many moles of FR2 will be produced? moles 3 FAD2 +2 R F3R2 +2 Ad O LNC

Save & Exit Certily Lesson: 5.5a Applications of Exponential F... DSHUN EDWARDS 2/11 Question 3 of 9, Step 1 of 1 Correct Bones from the skeleton of a fish have lost 75 percent of their carbon-14. Note that for carbon-14, the constant of proportionality is approximately k = 0.000124. Estimate the age of the bones. Round to the nearest tenth of a year. Answer How to enter your answer (opens in new window) E Keypac Keyboard Shortcu years Exit session US E ovo L-57 PROPERTY OF RICHARD BLAND COLLEGE

A fossil is found to have a "Clevel of 63.0% compared to living organisms. How old is the fossil? Macmillan Learning FR years

1. Complete the following table by writing the symbols of the two elements whose reactivities are being compared in each test: Test Tube Number 1 2 3 4 5 6 Greater activity Lesser activity