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Isotopes and Radioactive Decay: Terms and Definitions, Quizzes of Chemistry

Definitions for various terms related to isotopes and radioactive decay, including isotope, radioactive isotope, alpha particle, beta particle, positron, gamma rays, radioactive decay, alpha emission, beta emission, positron emission, gamma emission, half life, and radioactive dating.

Typology: Quizzes

2012/2013

Uploaded on 12/07/2013

sydneyc33
sydneyc33 🇺🇸

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TERM 1
isotope
DEFINITION 1
an atom of the same element (same number of protons) that
has a different number of neutrons
TERM 2
radioactive isotope
DEFINITION 2
unstable isotope- spontaneously emits energy to form a
more stable nucleus
TERM 3
alpha particle
DEFINITION 3
a high energy particle that contains 2 protons and 2
neutrons, +2 charge, and a mass number of 4
TERM 4
beta particle
DEFINITION 4
a high energy electron, a -1 charge, and a negligible mass
TERM 5
positron
DEFINITION 5
an "antiparticle" of beta particle since they have the same
negligible mass and opposite charges, +1 charge
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isotope

an atom of the same element (same number of protons) that

has a different number of neutrons

TERM 2

radioactive isotope

DEFINITION 2

unstable isotope- spontaneously emits energy to form a

more stable nucleus

TERM 3

alpha particle

DEFINITION 3

a high energy particle that contains 2 protons and 2

neutrons, +2 charge, and a mass number of 4

TERM 4

beta particle

DEFINITION 4

a high energy electron, a -1 charge, and a negligible mass

TERM 5

positron

DEFINITION 5

an "antiparticle" of beta particle since they have the same

negligible mass and opposite charges, +1 charge

gamma rays

high energy radiation released from a radioactive nucleus

TERM 7

radioactive decay

DEFINITION 7

the process by which an unstable radioactive nucleus emits

radiation, forming a new nucleus

TERM 8

alpha emission

DEFINITION 8

the decay of a nucleus by emitting an alpha particle

TERM 9

beta emission

DEFINITION 9

the decay of a nucleus by emitting a beta particle

the mass number stays constant

TERM 10

positron emission

DEFINITION 10

the decay of a nucleus by emitting a positron

mass number is constant