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Nuclear Energy

100

The splitting of a nucleus of an atom

Nuclear Fission

200

The half life of a certain radioactive element is 800 years.  How old is the object if only 12.5% of the radioactive atoms in it remain?

2,400 years old

300

When two nuclei combine to create a more massive atom

Nuclear Fusion

400

Selenium-83 has a half-life of 25 minutes.  How many minutes would it take for a 10 mg sample to decay and have only 1.25 mg of it remain?

75 minutes

500

The layer of Earth where radioactive decay occurs to produce energy for convection currents in Earth's interior

Inner Core

Bonding

100

A chemical bond created when atoms share electrons

Covalent Bond

200

Write the formula of Calcium Bromide and determine if it is Ionic or Covalent.

CaBr₂ 

Ionic

300

Name this compound and determine whether it is ionic or covalent- (NH₄)₃PO₄​​​​

Ammonium Phosphate

Ionic

400

Write the formula of the following compound and determine if it is ionic or covalent- Sulfur Tetrabromide

SBr₄ 

Covalent

500

Draw the Lewis Dot Diagram of Carbon Tetrachloride and determine if it is ionic or covalent.

Covalent

See structure on board!

Atomic Structure

100

Which subatomic particles are involved in forming chemical bonds?

Electrons

200

The number of ________ determines the identity of an element.

Protons

300

How many valence electrons does the element Sulfur contain?

6

400

How many electrons does an atom of Cu⁺² contain?

27

500

Calculate the average atomic mass of Lead given the percent abundances of its four isotopes.

1.40% Pb-204, 24.10% Pb-206, 22.10% Pb-207, 52.40% Pb-208

207.241 amu

Mixtures

100

If a spoonful of sugar is mixed in a glass of water, which is the solvent?

Water

200

What happens to the solubility of a gas in water as the temperature increases?

The solubility decreases

300

A solution is considered _____________ when no more solute can be dissolved in the solvent.

Saturated

400

What is the difference between a colloid and suspension?

In a suspension, the particles will settle while in a colloid, particles will remain evenly distributed in the mixture

500

Which one of the following would you classify salt water?

Pure Substance, Element, Compound, Solution, Suspension, Colloid

Solution

Chemical Reactions

100

How many oxygen atoms does the compound Aluminum Nitrate contain?

Al(NO₃)₃

9

200

In order for chemical bonds to be broken, energy must be ____________.

Absorbed

300

Classify the following phase changes as endothermic or exothermic

Melting

Evaporation

Freezing

Melting- Endothermic

Evaporation- Endothermic

Freezing- Exothermic

400

Balance the following equation

NH₃ + O₂ --> N₂ + H₂O

4NH₃ + 3O₂ --> 2N₂ + 6H₂O

500

Write and balance the following reaction...

Sodium Hydroxide and Copper (II) Sulfate produce Sodium Sulfate and Copper (II) Hydroxide

2NaOH + CuSO₄ --> Na₂SO₄ + Cu(OH)₂