4 - Nuclear Chemistry Exam Review

How many neutrons in C-14?

• 6
• 7
• 14
• 8

What quantities vary between isotopes of an element?

• protons, electrons, and atomic mass
• protons, electrons, and atomic number
• neutrons and electrons
• neutrons and atomic mass

What is the neutron's role in the nucleus?

• To counteract the repulsive forces between the protons.

• To counteract the repulsive force between electrons.

• To increase the mass of the atom, allowing it to react properly with other elements.

• To determine the type of element the atom is.

When a nucleus undergoes nuclear decay by gamma rays, the atomic number of the element....

• remains the same
• decreases by one.
• increases by one.
• increases by two.

Radioactive materials have unstable...

• electrons
• protons
• nuclei
• neutrons

Tags

NGSS.HS-PS1-8

The type of radioactive particle that can be stopped by a sheet of paper is the ____.

• alpha particle
• beta particle
• gamma ray
• positron

Negatively charged particles emitted from a nucleus at a high speed are ____. 

• alpha particle
• gamma rays
• beta particles
• X rays

Two atoms of the same element but with different mass numbers are called________

• electrons
• isotopes
• ions
• reaction partners

Which type of nuclear radiation is being emitted here?

• Alpha
• beta
• gamma 
• none

If we start off with element ⁵⁰₂₄X, then after an alpha decay we get the following isotope:

• ⁵⁰₂₂Y

• ⁴⁶₂₂Y

• ⁴⁸₂₀Y

• ⁵⁴₂₆Y