Part 2 of 3: Review for NC Final

Takes two small nuclei and combines them into a larger nucleus

• fission
• fusion

The splitting of a nucleus into smaller nuclei is

• fusion
• fission
• half-life
• gamma radiation

Energy in the sun is produced as a result of nuclear ____ reactions.

• fusion
• fission
• waste
• sub

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

The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed?

• 100.0g
• 50.0g
• 12.5g
• 8.5g

The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?

• 3.0g
• 0.25mg
• 0.3g
• 0.25g

What makes an element radioactive?

• When it's nuclei expands
• When it's electrons explode
• When it's nuclei behave
• When it's nuclei decay

Is Hydrogen considered a metal or a non-metal?

• Metal
• Non-metal

What two types of atoms make a covalent bond?

• 2 Nonmetals
• The transfer of neutrons 
• 2 Metals
• 2 Noble Gases

Covalent compounds

• Share electrons
• transfer electrons
• contain a sea of electrons
• conduct electricity