3rd Quarter Physical Science Exam

Which of the following best explains the significance of supernovae in the context of the periodic table of elements?

• Supernovae help in spreading lighter elements like hydrogen across the universe.

• Supernovae are solely responsible for creating all elements heavier than hydrogen.

• Supernovae create and disperse many elements, particularly those heavier than iron.

• Supernovae have no significant impact on element formation.

The formation of a star starts with the dense regions of molecular clouds. What force pulls matter together to form these regions?

• electromagnetic force

• gravitational force

• magnetic force

• nuclear force

It is the very old study and philosophy of how to change basic substances (such as metals) into other substances.

• Alchemy

• Chemistry

• Alchemist

• Chemist

It was created by bombardment of molybdenum by deuterons (heavy hydrogen, H12), by Emilio Segre and Carlo Perrier in 1937.

• Bohrium

• Neptunium

• Plutonium

• technetium

Who created a classification of elements based on their atomic weight?

• John Dalton

• Dmitri Mendeleev

• Henry Moseley

• J.J. Thomson

The following are synthetic elements, except:

• Americium

• Bohrium

• Curium

• Deuteron

What are elements that are artificially created in a laboratory called?

• Synthetic

• Natural

• Noble Gases

• Transition Metals

Which of the following will be the solvent if a non-polar substance dissolves in an unknown liquid?

• Polar

• Non-polar

• Water

• All of the Above

Which of the following will be the solvent if a polar substance dissolves in an unknown liquid?

• Polar

• Non-polar

• Water

• All of the Above

Which of the following is TRUE about the boiling point of polar molecules?

• Generally high boiling point

• Generally low boiling point

• Boiling point cannot be determined

• Similar non-polar molecules