OnRamps Chemistry Midterm 1 pratice

Which subatomic particle is responsible for defining the identity of an element?

• Electron

• Proton

• Neutron

• Nucleus

Most of the mass of an atom is concentrated in:

• The electron cloud

• The nucleus

• The protons only

• The neutrons only

Which of the following statements about isotopes is correct?

• Isotopes have the same mass number but different atomic numbers.

• Isotopes of an element have the same number of protons but different numbers of neutrons.

• Isotopes of an element have identical physical properties.

• Isotopes have different electron configurations.

Tags

NGSS.HS-PS1-8

For n = 3, what are the possible values of l?

• 0, 1

• 0, 1, 2

• 0, 1, 2, 3

• -1, 0, 1

What is the maximum number of electrons that can occupy the n = 3 shell?

• 8

• 10

• 18

• 32

An electron with quantum numbers n = 2, l = 1, ml = -1 would be in which subshell?

• 2s

• 2p

• 3d

• 1s

Which of the following has the longest wavelength?

• Infrared light

• X-rays

• Gamma rays

• Visible light

Tags

NGSS.HS-PS4-1

If the frequency of light increases, its wavelength:

• Increases

• Decreases

• Remains the same

• Cannot be determined

Tags

NGSS.HS-PS4-1

Place the following types of electromagnetic radiation in order of increasing energy:

• Infrared, visible light, gamma rays, ultraviolet

• Visible light, infrared, ultraviolet, gamma rays

• Infrared, visible light, ultraviolet, gamma rays

• Ultraviolet, gamma rays, infrared, visible light

Tags

NGSS.HS-PS4-4

What trend is observed as you move across a period from left to right in the periodic table?

• Atomic radius increases

• Ionization energy decreases

• Electronegativity increases

• Metallic character increases