Exploring Atomic Structure and Decay

What is the charge of a proton?

• 0

• +1

• -1

• +2

Which subatomic particle is found in the nucleus and has no charge?

• Electron

• Proton

• Neutron

• Positron

Tags

NGSS.HS-PS1-8

What is the atomic number of an element?

• Number of neutrons

• Number of protons

• Number of electrons

• Number of isotopes

Which of the following is a type of nuclear decay that emits a helium nucleus?

• Alpha decay

• Beta decay

• Gamma decay

• Positron emission

Tags

NGSS.HS-PS1-8

What is the symbol for an alpha particle?

Which isotope of carbon has 7 neutrons?

• 35.5 u

• 36.0 u

• 35.0 u

• 36.5 u

Which of the following best describes an isotope?

• Atoms with the same number of protons but different numbers of neutrons

• Atoms with the same number of neutrons but different numbers of protons

• Atoms with the same mass number but different atomic numbers

• Atoms with different numbers of electrons

A radioactive sample has a half-life of 10 years. How much of a 100 g sample will remain after 20 years?

• 100 g

• 75 g

• 50 g

• 25 g

Tags

NGSS.HS-PS1-8

Which type of nuclear decay does not change the atomic number or mass number of the nucleus?

• Alpha decay

• Beta decay

• Gamma decay

• Positron emission