DE_Phys_Unit4_NuclearProcesses - Nicholas Meyer | Library

3

(Engage) Every active star in the universe is generating energy through __________ reactions. The sun is composed of gases, primarily hydrogen and helium, which are compressed into a form of matter called __________. The __________ of such a large mass of gas causes intense pressure at the core of the sun which, combined with the extreme temperature (15,000,000°C), allows nuclear reactions to occur.

1

(Explore 1) A _______  is any particle in the nucleus, so it refers to protons and neutrons collectively.

1

(Explore 1) Different atoms of the same element can have a different number of _______ . 

2

(Explore 1) Helium has two stable forms, Helium-3 which has _______ protons and _______  neutron, and Helium-4 which has _______ protons and _______ neutrons.

1

(Explore 1) Pictured are three isotopes of Hydrogen. They differ in the number of _______.

1

(Explore 1) Which of these isotopes is named hydrogen-3 (H-3)?

1

(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.

2

(Explore 1) Some isotopes are unstable. The unstable isotopes will __________ radioactively at a continuous, predictable rate. When unstable isotopes decay, they __________ radioactive particles. Eventually they also transform into different elements.

1

(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.

1

(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

00:00/00:00

Question 11

00:43

Question 12

00:51

Question 13

01:03

Question 14

02:04

1

(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.

1

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

4

(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_______ .

1

(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 _______ .

3

(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

00:00/00:00

Question 20

02:11

Question 21

02:41

Question 22

03:30

6

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.       