Q3 Examination - Review

Identify the molecule that contains an ionic bond.

• N - N

• F - I

• P - S

• K - Cl

Which of the following cosmic stages formed the elements heavier than Be up until Fe?

• Big Bang Nucleosynthesis

• Recombination

• Stellar Explosion

• Stellar Formation & Evolution

What do we call the measure of the relative tendency of an atom to attract electrons to itself when chemically combined with another atom?

• Electronegativity

• Hydrolysis

• Isotope

• Radioactive Decay

What discovery revolutionized the understanding of the periodic table and element identity?

• The existence of isotopes

• The concept of atomic mass

• The identification of noble gases

• The relationship between atomic number and element properties

Select the main factor that determines whether a star can undergo further fusion reactions beyond helium burning.

• The age of the star in its life cycle.

• The initial mass of the star at its birth.

• The presence of a nearby companion star.

• The abundance of heavier elements in the star.

The first step in the disintegration of uranium is ²³⁸U → ²³⁴Th. Identify the particle that is released in this reaction.

• Alpha particle

• Gamma Ray

• Neutron

• Proton

During the core collapse and rebound of a Type II Supernova, there is an exceptionally high neutron irregularity. This means that neutron capture occurs much more rapidly before beta decay can occur and many heavier nuclei are created. Identify the type of nucleosynthesis stated:

• CNO Cycle

• Proton-proton Chain Reaction

• R process

• S process

Complete the equation in the Triple Alpha Process: ⁸⁴Be + ? → ¹²⁶C + γ

• ⁸₄Be

• ²₁H

• ⁴₂He

• e⁺

Choose the element in which the isotope Cr-53 is produced by its Beta (-) decay:

• ⁵³Mn

• ⁵⁴Cr

• ⁵²Cr

• ⁵³V

There are gaps in the table, hinting at undiscovered elements. You and your colleagues spend years bombarding different elements with particles in hopes of creating something new. You see flashes, hear whirs, and analyze the results, but nothing new appears. Frustration mounts. Determine why scientists were unable to create new elements before understanding atomic number?

• The periodic table was incomplete at the time.

• They didn't have access to radioactive materials.

• They lacked the technology to manipulate atomic structures.

• They focused on changing the mass, not the number of protons.