Physical Science Quiz

Who first proposed that atoms have positive and negative charges embedded within it?

• John Dalton

• JJ Thompson

• Earnest Rutherford

• Niels Bohr

Which atomic models have a fixed positively charged nucleus?

• Atomism, Solid sphere, Plum Pudding

• Plum Pudding, Atomism, Planetary

• Nuclear, Planetary, Quantum

• Plum Pudding, Planetary, Quantum

What is the difference between Earnest Rutherford's model from Niels Bohr's model?

• The nuclear model proposes that electrons move in fixed orbits, while the planetary model suggests electrons are spread randomly

• The nuclear model suggests electrons move around a central nucleus, while the planetary model describes electrons as stationary around the nucleus

• The nuclear model was proposed by Rutherford, while the planetary model was proposed by Dalton

• The nuclear model states that the electrons orbit the nucleus, while the planetary model explains that electrons orbit the nucleus at specific pattern.

How did the discovery of subatomic particles (electron, proton and neutrons) influence the development of atomic models.

• It reinforced Dalton's idea of atoms as indivisible particles

• It led to the proposal of the nuclear model, which identifies a dense positively charged nucleus surrounded by orbiting electrons

• It supported the plum pudding model by showing that electrons and protons are uniformly mixed within an atom

• It confirmed that atoms have no internal structure and that electrons are randomly distributed around a homogeneous sphere.

What is the process of nucleosynthesis?

• The process by which atoms split to release energy

• The formation of elements.

• The creation of molecules from atoms in space

• The conversion of energy into mass in particle accelerators.

Which subatomic particles give birth to the formation of Helium?

• Proton, Electron

• Neutron, Proton

• Electron, Neutron

• Proton only

How is nucleosynthesis related to the lifecycle of stars?

• Nucleosynthesis is the process by which stars form from gas clouds, and it occurs only at the beginning of a star's life.

• Nucleosynthesis is the process by which stars fuse lighter elements into heavier elements, and it continues throughout a star's lifetime until the star dies.

• Nucleosynthesis refers to the collapse of a star into a black hole, creating elements during the process.

• Nucleosynthesis is unrelated to the lifecycle of stars, as it occurs only in interstellar space.

Imagine you are a scientist responsible for studying heavier elements. Which of the following statements best describes how the element oxygen is formed?

• Through the process of nuclear fission in stars

• In the cores of stars through nuclear fusion, primarily by fusing helium atoms

• During photosynthesis, where plants convert carbon dioxide into oxygen

• By the fusion of two hydrogen atoms in the core of the Sun

The electronegativity of oxygen is 3.5 while phosphorous is 2.1. What type of bonding are they?

• Polar Covalent Bond

• Non-polar Covalent Bond

• Ionic Bond

• Polar Molecule

What does the principle 'like dissolves like' imply in the polarity of molecules to substances?

• Polar molecules can mix with non-polar molecules.

• Polar molecules cannot mix with polar molecules.

• Polar molecules will mix moderately with non-polar molecules.

• Polar molecules will mix with polar molecules.