What is the smallest particle of matter that can exist and still retain its identity?

• Molecules

• Protons

• Atoms

What is the process by which an atom loses or gains electrons?

• Valence

• Ionization

• Conduction

What determines the ability of an atom to gain or lose an electron?

• Valence

• Energy Level

• Atomic Mass

Which element represents the simplest form of an atom?

• Oxygen

• Hydrogen

• Helium

What is the main property that defines each element in an atom?

• Number of Protons

• Number of Neutrons

• Number of Electrons

Which type of material falls between conductors and insulators in terms of electrical properties?

• Superconductors

• Semiconductors

• Metals

What is the term for electrons that can participate in chemical bonds with other atoms?

• Drifting electrons

• Free Electrons

• Valence Electrons

What is the difference between mass and weight?

• weight is determined by gravity, Mass is the amount of matter

• Mass is the substance, weight is the composition

• Mass is the amount of matter, weight is the volume

Which of the following statements correctly describes the relationship between the particles in an atom?

• The proton has a mass approximately 1837 times greater than the electron, and it is located in the nucleus along with the neutrons.

• Electrons are located in the nucleus and have a mass similar to that of protons and neutrons.

• The neutron is a negatively charged particle and weighs 1845 times more than an electro

Which statement best describes a compound?

• A compound is a substance made up of only one element and cannot be reduced by chemical means.

• A compound is a chemical combination of two or more elements, such as water, which consists of two hydrogen atoms and one oxygen atom.

• A compound is a simple substance like oxygen or iron that cannot be broken down into simpler forms.