FINAL EXAMINATION IN PHYSICAL SCIENCE

This is defined as the process of formation of elements through the combination of the simple nuclei or atomic particles by means of a nuclear reaction.

• Nuclear reaction

• Nucleosynthesis

• Nucleus

• None of the above

Which of the following is NOT a subatomic particle?

• Electron

• Proton

• Molecule

• Neutron

The atomic number of an element represents:

• The number of protons in the nucleus

• The number of neutrons in the nucleus

• The total number of protons and neutrons

• The number of electrons in the nucleus

What is the most abundant element in the universe?

• Hydrogen

• Helium

• Carbon

• Oxygen

During the early universe, which element was primarily formed through the process of nuclear reactions? This is also known as the building block of all other elements except for Hydrogen.

• Carbon

• Iron

• Oxygen

• Helium

What process describes the formation of heavier elements in the universe?

• Fission

• Fusion

• Combustion

• Supernova

The process of nucleosynthesis during the Big Bang primarily formed elements:

• Hydrogen and Helium

• Carbon and Oxygen

• Iron and Nickel

• Helium and Lithium

The mass composition of the early universe was said to comprise approximately _% Hydrogen, _% Helium, and _% of other heavier elements.

• 74% ; 24% ; 2%

• 76% ; 23% ; 1%

• 73% ; 25% ; 2%

• 75% ; 24% ; 1%

The first three elements formed during the Big Bang nucleosynthesis are:

• Helium, Oxygen, Carbon

• Hydrogen, Helium, Lithium

• Iron, Uranium, Gold

• Nitrogen, Silicon, Neon

This refer to atoms of the same element with a different number of neutrons. They are also called as different “versions of an element.”

• Deuterium

• Tritium

• Isotopes

• Nucleosynthesis