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Section 4: Unstable Nuclei and Radioactive Decay


1.	What is the name for the emission of rays and particles by a radioactive material? Need a Hint?
		A)	radiation
		B)	nuclear reactivity
		C)	decay
		D)	radioactive series


2.	What is the charge of an alpha particle? Need a Hint?
		A)	1⁺
		B)	2⁺
		C)	1^–
		D)	0


3.	What is the charge of a beta particle? Need a Hint?
		A)	1⁺
		B)	2⁺
		C)	1^–
		D)	0


4.	What is the charge of a gamma ray? Need a Hint?
		A)	1⁺
		B)	2⁺
		C)	1^–
		D)	0


5.	How do gamma rays differ from alpha particles and beta particles? Need a Hint?
		A)	Alpha particle and beta particle emissions result in the formation of new atoms, whereas gamma ray emissions do not.
		B)	Gamma rays and beta particles result in the formation of new atoms, but alpha particles do not.
		C)	Gamma rays and alpha particles result in the formation of new atoms, but beta particles do not.
		D)	Gamma rays have mass, whereas alpha and beta particles do not.


6.	What is the primary factor in determining an atom’s stability? Need a Hint?
		A)	neutron to proton ratio
		B)	proton to electron ratio
		C)	neutron to electron ratio
		D)	alpha particle to beta particle ratio


7.	What fundamental particle is identical to a beta particle? Need a Hint?
		A)	the proton
		B)	the neutron
		C)	the electron
		D)	the positron