Lesson 7.3 Types of Radioactive Decay

Question 1

Identify whether each reaction represents a chemical reaction or a nuclear reaction by filling in the blank with the word ‘chemical’ or ‘nuclear’.Cl + H 2HClThis represents a reaction.

Revolt · Accepted Answer

"chemical"; "nuclear"

Question 2

[image 1] H + [image 2] H [image 3] [image 4] He + [image 5] nThis represents a reaction

Revolt · Accepted Answer

nuclear

Question 3

C X highestlowestintermediate

Revolt · Accepted Answer

lowest

Question 4

D ✔ highestlowestintermediate

Revolt · Accepted Answer

highest

Question 5

E X thin metallead bricksthin cardboard

Revolt · Accepted Answer

thin cardboard

Question 6

Which statement best describes the two reactions?AB

Revolt · Accepted Answer

Reaction B involves a greater change and a change in element identity.

Question 7

Explain why isotopes of the same element behave differently in nuclear reactions but not in chemical reactions.

Revolt · Accepted Answer

Isotopes of the same element differ only in neutron numbers. Nuclear reactions involve changes to the protons or neutrons in an atom’s nucleus, but not changes to its electrons. Chemical reactions involve changes to the electrons in atoms, but not changes to its protons or neutrons. Isotope behavior only differs when a reaction involves neutrons.

Question 8

Use the drop-down menus to complete the corresponding cells in the table to the right.A B C D E

Revolt · Accepted Answer

particle with two protons and two neutrons; Selection 1: particle with two protons and two neutrons; Selection 2: high-energy photon; Selection 3: intermediate; Selection 4: highest; Selection 5: thin cardboard

Question 9

Identify whether each reaction represents a chemical reaction or a nuclear reaction by filling in the blank with the word ‘chemical’ or ‘nuclear’.Cl [image 1] + H [image 2] [image 3] 2HClThis represents a reaction.

Revolt · Accepted Answer

chemical; H + H He + nThis represents a: nuclear

Question 10

Which statement best describes the two reactions?A [image 1] B [image 2]

Revolt · Accepted Answer

Reaction B involves a greater change and a change in element identity.

Lesson 7.3 Types of Radioactive Decay Answers

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