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Biblioteka

DE_Phys_Unit4_NuclearProcesses

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Posljednje ažuriranje about 3 years ago
23 questions
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Pitanje 1
1.

(Engage) Every active star in the universe is generating energy through . The

Pitanje 7
7.

(Explore 1) Which sentence explains why C-12 and C-13 are more prevalent on Earth.

Certain isotopes of an element occur in nature much more frequently than others. For instance, carbon-12 accounts for about 98.9 percent of all carbon atoms in nature. The main factor that affects the frequency of a particular isotope is its stability. Certain isotopes of carbon, such as carbon-12 and carbon-13, are stable.

Pitanje 8
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(Explore 1) Some isotopes are unstable. The unstable isotopes will radioactive particles. Eventually they also transform into different elements.

Pitanje 9
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(Explore 1) Vocabulary: A isotope that forms from the radioactive decay of an atom; the isotope may or may not be the same element as its parent.

Pitanje 10
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(Explore 1) Vocabulary: A isotope is one that changes into different isotopes through radioactive decay.

Question 11
00:43
Question 12
00:51
Question 13
01:03
Question 14
02:04
Pitanje 15
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(Explore 2) Inside the nucleus, you would expect all the protons to repel each other...but they don't. This is due to another force acting on them called the force.

Pitanje 16
16.

(Explore 2) Select all true attributes of strong nuclear forces

Pitanje 17
17.

(Explore 2) Many isotopes of elements that are found in nature are . The protons and neutrons of unstable elements will not naturally stay together...they will eventually . As they undergo radioactive decay, the nuclei will emit particles as they transform. This process can happen very or very .

Pitanje 18
18.

(Explore 2) So far, scientists have found types of naturally occurring radioactive decay. With alpha decay, the daughter isotope will become an entirely different element because it has lost protons. Beta decay involves the emission of beta particles when a decays into a , , and a subatomic particle called an .

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Pitanje 19
19.

(Explore 2) Based on this nuclear reaction, the hydrogen started with neutrons and ended with neutrons. Additionally, an electron and a were emited.

Question 20
02:11
Question 21
02:41
Question 22
03:30
Pitanje 23
23.

Radioactive decay of atoms does not happen all at once. It happens and is impossible to predict when and which atoms will decay...it is a process. The only thing that can be determined is the rate of decay, which by isotope. The number of decays is to the number of particles in the sample. The amount of time for half of a sample of a particular isotope to decay is and is known as the half-life of the isotope.

Drugi mogući odgovor:
gradually
average
random
constant
varies
proportional