Nuclear 21.1

What part of an atom undergoes change during radioactive decay?

• the nucleus

• all electrons surrounding the nucleus

• only electrons in the first energy level

• only valence electrons

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NGSS.HS-PS1-8

What are characteristics of alpha radiation?

• particles of negative charge, large mass, high penetrating power

• high-energy photons, very high penetrating power

• particles of negative charge, little mass, moderate penetrating power

• particles of positive charge, large mass, low penetrating power

Tags

NGSS.HS-PS1-8

What factors affect chemical reactions but not nuclear reactions? CHECK ALL CORRECT ANSWERS

• change in temperature

• change in pressure

• type of elements

• presence of catalysts to speed up reactions

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NGSS.HS-PS1-5

How is the atomic number of a nucleus changed by alpha decay?

• increases by 1

• increases by 2

• decreases by 1

• decreases by 2

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NGSS.HS-PS1-8

What is balanced in a balanced nuclear equation?

• the number of beta particles on both sides of the equation

• the number of alpha particles on both sides of the equation

• the number of atoms of each element on both sides of the equation

• the total atomic numbers and mass numbers on both sides of the equation

Tags

NGSS.HS-PS1-8

How does alpha decay affect the mass number during radioactive decay?

• decreases by 2

• decreases by 4

• increases by 2

• decreases by 1

Tags

NGSS.HS-PS1-8

Which type of nuclear radiation is most penetrating and why?

• Gamma, because it has no mass and very high energy

• Gamma, because it has greatest mass and high energy

• Alpha, because it has the greatest mass and the highest energy

• Beta, because it can be both positive and negative charged

Tags

NGSS.HS-PS1-8

What are the characteristics of beta radiation?

• largest mass and lowest energy

• zero mass and highest energy

• release of an electron or positron

• formation of an ion

Tags

NGSS.HS-PS1-8

Which type of nuclear radiation cannot penetrate paper?

• alpha

• beta positive

• beta negative

• gamma

Tags

NGSS.HS-PS1-8

Ionizing radiation is dangerous because ....

• it changes the mass of the nucleus

• it release large amounts of heat

• it generates nuclear energy

• it strips electrons from atoms

Tags

NGSS.HS-PS1-8

NGSS.HS-PS4-4