Question and answer
One isotope of silicon, Si-32, has a half-life of 150 years. If there were 300 atoms of silicon initially, approximately how many atoms will be left after 150 years?
start with 300 atoms - after 150 yrs, half are gone -150 remain. 150 years after that, half of the remaining 150 will be gone and you are down to 75. After the 3rd 150 year stretch, half of those will be gone and you have 37.5 atoms left. [ You can't have half an atom, so call it 37 or 38. With very large numbers of atoms, you wont run into the half an atom problem for a very very long time -
maybe never ]
Expert answered|khalilahmed88|Points 40|
Question
Asked 3/20/2013 3:54:53 PM
0 Answers/Comments
Get an answer
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
Questions asked by the same visitor
Cycloalkanes are alicyclic compounds. True False
Weegy: The answer is True. Cycloalkanes are alkanes that have carbon atoms that form a ring (called alicyclic compounds). (More)
Question
Expert Answered
Asked 3/13/2013 10:59:02 AM
0 Answers/Comments
Which of the following can aromatic compounds be? A. Autocyclic B. Hydrothermal C. Polycyclic D. Thermocyclic
Weegy: aromatic compounds can be Polycyclic . answer is C (More)
Question
Expert Answered
Asked 3/13/2013 11:28:26 AM
0 Answers/Comments
How many possible hydrogen atoms can be in a cycloalkane with 48 carbon atoms? A. 46 B. 48 C. 96 D. 98
Weegy: How many possible hydrogen atoms can be in a cycloalkane with 48 carbon atoms? C. 96 (More)
Question
Expert Answered
Asked 3/13/2013 11:37:53 AM
0 Answers/Comments
Which statement is accurate regarding cycloalkanes? A. They have aromatic properties. B. They have saturated ring structures. C. They are unsaturated. D. They have triple bonds.
Weegy: Cycloalkanes have saturated ring structures. Cycloalkanes are saturated hydrocarbons containing a ring in their carbon backbones. (More)
Question
Expert Answered
Asked 3/13/2013 2:59:19 PM
0 Answers/Comments
How many possible hydrogen atoms can be in a cycloalkane with 48 carbon atoms? A. 46 B. 48 C. 96 D. 98
Weegy: 96 hydrogen atoms can be in a cycloalkane with 48 carbon atoms. (More)
Question
Expert Answered
Asked 3/13/2013 3:05:17 PM
0 Answers/Comments
20,603,599 questions answered
Popular Conversations
Find the product. (0.5n^5)2(10n^7)3
Weegy: (0.5n^5)^2(10n^7)^3 = 0.25n^10*1000n^21 = 250n^31 User: Find the product. (y 2)5 · y 8 User: Find the ...
4/27/2015 10:47:32 AM| 4 Answers
Simplify 5x + 4x + 1. User: Simplify -3 xy3 + 7 xy3 + (- xy3 ) + (-3 ...
Weegy: Simplifying 6x2 + -17x + 5 = (3x + -1)(2x + -5) Reorder the terms: 5 + -17x + 6x2 = (3x + -1)(2x + -5) Reorder ...
4/26/2015 5:05:02 PM| 3 Answers
Find the quotient. (4ab - 8a 2 + 12ac) ÷ 4a User: Find the sum and ...
Weegy: Can you provide us the options and clarify the equation given please. User: Find the sum and choose the ...
4/27/2015 10:32:59 AM| 3 Answers
What is shutter speed?
4/27/2015 11:20:00 AM| 3 Answers
The Indo-European languages are believed to have originated ...
Weegy: Indo-European languages originated 7,800 to 9,800 years ago in Anatolia present day Turkey. [ The Indo-European ...
4/26/2015 10:36:09 AM| 2 Answers
A line passes through the points (-10,4) and (-1,2). What is the ...
Weegy: A line passes through the points and (-10, 4) and (-1, 2) The slope of the line that passes through the two ...
4/26/2015 4:05:37 PM| 2 Answers
Simplify 8(3 - 2x).
Weegy: 8(3 - 2x) = 8*3 - 8*2x = 24 - 16x User: Simplify 81.56 + n - 2.55. Weegy: 81.56 + n - 2.55 = 79.01 + n ...
4/26/2015 4:58:32 PM| 2 Answers
A real number is irrational. a. always c. never b. sometimes User: ...
Weegy: 2(4 - 2x + y) - 4(5 + x - y) = 8 - 4x + 2y - 20 - 4x + 4y; = -8x + 6y - 12 User: Every integer is a whole ...
4/26/2015 8:11:55 PM| 2 Answers
Weegy Stuff
S
L
Points 712 [Total 2289]| Ratings 1| Comments 702| Invitations 0|Offline
S
L
Points 633 [Total 1200]| Ratings 2| Comments 613| Invitations 0|Offline
S
P
C
L
P
L
1
P
P
1
Points 507 [Total 8384]| Ratings 3| Comments 477| Invitations 0|Online
S
Points 460 [Total 460]| Ratings 1| Comments 450| Invitations 0|Offline
S
Points 247 [Total 247]| Ratings 2| Comments 227| Invitations 0|Offline
S
Points 243 [Total 243]| Ratings 2| Comments 223| Invitations 0|Offline
S
1
L
L
Points 189 [Total 8183]| Ratings 0| Comments 189| Invitations 0|Offline
S
L
1
R
Points 138 [Total 1210]| Ratings 2| Comments 118| Invitations 0|Offline
S
L
Points 125 [Total 3728]| Ratings 0| Comments 125| Invitations 0|Online
S
1
L
1
Points 43 [Total 3484]| Ratings 1| Comments 33| Invitations 0|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2015 Purple Inc.