Chemistry Final Review 2024 Flach part 2

Front

What is the balanced equation for the reaction of magnesium and hydrochloric acid?

Back

Mg + 2 HCl -> MgCl2 + H2

Front

What is the electron configuration of cadmium (Cd)?

Back

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10

Front

What is the definition of mass number?

Back

The mass number is the total number of protons and neutrons in an atomic nucleus.

Front

What is the mass number of an atom with 197 total nucleons?

Back

197

Front

How do ultraviolet rays compare to visible light in terms of wavelength and energy?

Back

Ultraviolet rays have shorter wavelengths and more energy than visible light.

Front

What is the electron configuration for tungsten (W)?

Back

[Xe] 6s2 4f14 5d4

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations ensures that the law of conservation of mass is obeyed.

Front

What is the role of protons in determining the identity of an element?

Back

The number of protons in an atom's nucleus defines the element's atomic number.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the range of all types of electromagnetic radiation, including visible light, ultraviolet rays, and X-rays.