CP Environmental CH. 16 Test Review

When atoms are split, from which part of the atom is the energy released?

• electrons

• isotopes

• nucleus

• the radioactive part

Which of the following is NOT a concern about nuclear energy?

• waste disposal

• safety

• cost

• inadequate power output

The nucleus of an atom consists of protons and _____.

• neutrons

• electrons

• helium

• isotopes

The number of protons in its nucleus determines an atom's _____

• element

• mass

• charge

• properties

The atomic mass of oxygen is 16. How many neutrons does oxygen have in its nucleus?

• 16

• 4

• 8

• 32

A uranium atom can have an atomic mass of 235 or 238. Each atom is, therefore, ______.

• a different isotope

• negatively charged

• a different element

• stable

Atoms that emit particles and energy from their nuclei are called

• stable

• contaminated

• heavy

• radioactive

The electromagnetic radiation that is emitted from radioactive elements is released in the form of _____

• beta particles

• gamma rays

• alpha particles

• neutrons

The half-life of carbon-14 is 5,730 years. If 1,000 atoms of C-14 were set out in 1995, in what year would there be 500 atoms left?

• 7725

• 3735

• 6730

• 5730

Uranium isotopes decay into a stable form of

• gamma rays

• lead

• carbon-14

• uranium-235