Nuclear Unit Review

An unstable nucleus ______

• increases its nuclear mass through fission
• expels all of its neutrons
• increases its half-life
• emits energy when it decays

Tags

NGSS.HS-PS1-8

What does the 238 represent in plutonium-238?

• the mass number
• the atomic number
• the number of neutrons
• mass defect

What is the charge on a gamma ray?

• 0
• -1.0
• =1
• =2

What particle is emitted in an alpha decay?

• electron
• proton
• photon
• helium nucleus

Tags

NGSS.HS-PS1-8

A beta particle is a (an)

• photon
• helium nucleus
• electron
• neutron

Tags

NGSS.HS-PS1-8

What is the least penetrating form of radiation?

• beta radiation
• alpha radiation
• gamma rays
• fission radiation

What particle does argon-39 emit when it decays to potassium-39?

• neutron
• beta particle
• proton
• alpha particle

Tags

NGSS.HS-PS1-8

What element does polonium-208 decay to when it emits an alpha particle?

• Pb-210
• Po-210
• Pb-204
• Rn-214

Tags

NGSS.HS-PS1-8

Cesium-127 has a half-life of 30.0 years. How much cesium-137 was present initially if, after 120.0 years 6.0g remains?

• 8.0g
• 24g
• 48g
• 96g

Tags

NGSS.HS-PS1-8

Sodium-25 has a half-life of 1.00 minute. If a sample starts as 60.0g how much will remain after 30.0 minutes?

• 60.0g
• 120.0g
• 1.0g
• 2.0g

Tags

NGSS.HS-PS1-8