Atom & the Nucleus

The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed?

• 100.0g
• 50.0g
• 12.5g
• 8.5g

Tags

NGSS.HS-PS1-8

What would two different isotopes of an atom have in common?

• Number of neutrons 
• Number of protons
• Atomic weight 
• Atomic mass

In what part of an atom can protons be found? 

• Inside the electrons
• Inside the neutrons 
• Inside the atomic nucleus 
•  Inside the electron shells

Tags

NGSS.MS-PS1-1

An isotope is the same element with a different number of...?

• Protons
• Neutrons
• Electrons

Tags

NGSS.HS-PS1-8

Which type of nuclear radiation is being emitted here?

• alpha
• beta
• gamma
• none

Tags

NGSS.HS-PS1-8

Which type of nuclear radiation is being emitted here?

• Alpha
• beta
• gamma 
• none

Tags

NGSS.HS-PS1-8

Balance the following equation:
¹⁴₆C --> ⁰_-1e + ________

• ¹⁴₅B
• ¹⁴₆C
• ¹⁴₇N
• ⁴₂He

Tags

NGSS.HS-PS1-8

• Fission  reaction
• Fusion reaction
• Artificial Transmutation and then a fission reaction
• alpha decay

In the reaction ²⁴₁₁Na →²⁴₁₂Mg + X, particle X is a

• alpha particle

• helium nuclei

• neutron

• beta particle

Tags

NGSS.HS-PS1-8

In the reaction ²⁴₁₁Na →²⁴₁₂Mg + X, particle X is a

• A) positron

• B) electron

• C) proton

• D) neutron

Tags

NGSS.HS-PS1-8