Exploring Atomic Structure and Subatomic Particles

What is the primary unit used to describe atomic mass?

• Milligrams

• Kilograms

• Grams

• Atomic Mass Unit (amu)

What is the approximate mass of a proton in amu?

• 0.0005 amu

• 1.0073 amu

• 1.66054 amu

• 1.0087 amu

What is the charge of a neutron?

• +1

• 0

• -1

• +1.602 x 10^-19 coulombs

How many electrons are needed to match the mass of one proton?

• 1000

• 100

• Thousands

• 10

What is the unit 'angstrom' used to measure?

• Length

• Mass

• Time

• Charge

What is the equivalent of 1 angstrom in meters?

• 10^-10 meters

• 10^-9 meters

• 10^-7 meters

• 10^-8 meters

What does the atomic number of an element represent?

• Atomic mass

• Number of electrons

• Number of protons

• Number of neutrons

In a neutral atom, the number of protons is equal to the number of:

• Neutrons

• Electrons

• Isotopes

• Nuclei

What defines isotopes of the same element?

• Same chemical properties, different physical properties

• Same atomic mass, different atomic number

• Same number of neutrons, different number of protons

• Same number of protons, different number of neutrons

How is carbon-14 different from carbon-12?

• Different chemical properties

• Different number of neutrons

• Different number of electrons

• Different number of protons