Daily Quiz Nuclear Chemistry

The time it takes for half of the radioactive nuclei in a sample to decay:

• strong nuclear force

• half-life

• radioactive time

• alpha decay

²¹⁰₈₄Po → ⁴₂He + ____________

• ²¹⁴₈₂Pb

• ²⁰⁶₈₂Pb

• ²¹⁴₈₆Rn

• ²⁰⁶₈₄Rn

Write a nuclear equation for Fr-230 when it undergoes beta decay.

• ²³⁰₈₇Fr → ⁴₂ He + ²²⁶₈₅At

• ²³⁰₈₇Fr → ⁰_-1 e + ²³⁰₈₆Rn

• ²³⁰₈₇Fr → ⁴₂ He + ²³⁴₈₉Ac

• ²³⁰₈₇Fr → ⁰_-1 e + ²³⁰₈₈Ra

You have 20 grams of uranium that has a half-life of 2 seconds, how much will be left after 4 seconds?

• 5 grams

• 2 seconds

• 6 grams

• 8 grams

What is the Half Life of this isotope?

• 3 days

• 5 days

• 8 days

• 10 days

When an isotope goes through 3 half-lives, _____ _________________ remains

• 1/32 of 3.125%

• 1/8 or 12.5%

• 1/16 or 6.25%

What is the half-life of radium-226?

• 1600 years

• 3200 years

• 4800 years

• 6400 years

This image shows

• nuclear fission

• nuclear fusion

This image shows

• Nuclear fission

• Nuclear fusion

What is the only difference between two different isotopes of the same element?

• Number of neutrons

• Number of protons

• Number of electrons

• Size of atom