Chemistry Unit 1 Review

Light duality states that light can act as both

Which type of radioactive partice can be blocked with a simple piece of paper?

When electrons become excited and move to a higher shell, they emit colored light when they return to ground state.

The process of differentiation of the Earth's layers relied heavily on

Spectral lines can help scientists determine chemical compositions of stars.

Which of these processes is not found in the rock cycle?

The mantle contains magma which produces convection currents.

U-234 and U-238 are examples of

The atomic number is always larger than the atomic mass.

You can find the number of neutrons by subtracting the atomic number from the mass.

Sediments and magma are the two major types of rocks.

A type of reaction in which a large unstable nuclei is split into smaller more stable nuclei.

Various metallic ions give off different colored light because

The theory that the Earth's crust is split into sections that are constantly floating/moving is called

The atomic number on the periodic table determines the

An atom with an overall positive or negative charge is called

Which of the following is the outermost layer of the Earth?

Fission reactions were used in hydrogen bombs.

Which type of radioactive particle/wave requires several centimeters of lead to prevent harm?

Light can only act as a wave.