nuclear decay chemistry I

Radon-222 has 86 protons and 136 neutrons. What daughter product will form from alpha decay? 

• Francium-222 (87 protons) 
• Polonium-218 (84 protons) 
• Radium-226 (88 protons) 
• Lead-220 (82 protons) 

Tags

NGSS.HS-PS1-8

What type of decay is illustrated by the equation? 

• alpha decay
• beta decay
• positron emission
• electron capture

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NGSS.HS-PS1-8

Positively charged particles that consist of two protons and two neutrons are called

• alpha particles
• beta particles
• gamma rays
• neutron emissions

An electron that is emitted during radioactive decay is a

• neutron
• gamma ray
• alpha particle
• beta particle

What is Half-life?

• The amount of time it takes for some of the nuclei in a sample of the isotope to decay
• The amount of time it takes for half the electrons in a sample of the isotope to decay
• The amount of time it takes for half the nuclei in a sample of the isotope to decay
• the amount of time it takes to double the nuclei in a sample of the isotope to decay

Tags

NGSS.HS-PS1-8

What percent of carbon-14 would be left after 5730 years?

• 100%
• 75%
• 50%
• 25%

The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 75 years if the initial amount is 100 grams?

• 75
• 50
• 25
• 12.5

The least penetrating type of radiation

• Alpha particle
• Beta particle
• gamma ray

A form of radiation that carries energy and has no mass and no charge.

• Alpha particles
• Beta Particles
• Gamma Rays
• Daughter nucleus

Tags

NGSS.HS-PS1-8

Complete the nuclear equation and determine the type of decay that is occurring in this reaction. 

• alpha
• beta
• gamma
• none

Tags

NGSS.HS-PS1-8