Physical Science Final Exam Review 2

Choose the correct coefficients for the balanced reaction of Ag₂O --> Ag + O₂

• 1:1:1

• 2:4:1

• 4:2:1

• 2:1:1

Choose the correct coefficients for the balanced form of the reaction:

NaCl + F₂ --> NaF + Cl₂

• 1:1:1:1

• 2:1:1:1

• 2:1:1:2

• 2:1:2:1

How many electrons will be drawn in the Bohr model of sulfur?

• 16

• 6

• 12

• 2

How many valence electrons does carbon have?

• 2

• 4

• 6

• 8

Which of the following elements is most likely to donate two electrons?

• Oxygen

• Aluminum

• Calcium

• Iodine

What happens as you move from left to right on the periodic table?

• The number of valence electrons increases

• The number of valence electrons decreases

• The number of energy shells increases

• The number of energy shells decreases

An element with more than 4 valence electrons....

• Is more likely to donate electrons

• Is more likely to take electrons

• Is more stable than those with less than 4

• Will be heavier than an element with less than 4

What fraction of an isotope will remain after undergoing 4 half-lives?

• 1/2

• 1/8

• 1/16

• 1/32

An 100g sample of an unstable isotope is allowed to go through 6 half-lives. What mass of the isotope will remain?

• 1.6g

• 3.1g

• 6.2g

• 12.5g

Which type of radioactive decay reduces the mass of the isotope by 4?

• Alpha Decay

• Beta Decay

• Gamma Decay

• Neutron Decay