Atomic Structure and Radioactivity

What is at the center of an atom?

• Electron

• Nucleus

• Shell

• Orbit

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NGSS.HS-PS1-8

What does the atomic number represent?

• Number of electrons

• Number of neutrons

• Sum of protons and neutrons

• Total number of protons

What defines an element?

• Mass number

• Total number of protons

• Number of neutrons

• Number of electrons

What does the mass number represent?

• Sum of all particles in the nucleus

• Sum of protons and neutrons

• Number of electrons

• Number of protons

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NGSS.HS-PS1-8

What is an isotope?

• Atom with fewer protons

• Atom with additional protons

• Atom with different number of neutrons

• Atom with extra electrons

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What type of charge does an alpha particle have?

• +2

• 0

• +1

• -1

Which radiation type is a high-speed electron?

• Neutron

• Gamma

• Beta

• Alpha

What happens during beta radiation emission?

• A neutron is emitted

• An electron is absorbed

• A proton turns into a neutron

• A neutron turns into a proton

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NGSS.HS-PS1-8

What is gamma radiation?

• A high-speed proton

• A burst of electromagnetic radiation

• A heavy particle with +2 charge

• A neutron emission

Tags

NGSS.HS-PS1-8

NGSS.HS-PS4-3

What is the half-life of a radioactive isotope?

• Time to lose all its radioactivity

• Time for half of the isotope to decay

• Time for it to double its radioactivity

• Time for all neutrons to decay

Tags

NGSS.HS-PS1-8