Unit 3 Test Review - Atoms and Nuclear Chemistry

______ occurs when a nucleus is split into smaller pieces, whereas ______ occurs when nuclei combine.

What is the mass and atomic numbers for the Xenon-133?

Which man's atomic theory was based on scientific research?

Most of the _________ of an atom is found in the nucleus.

Atoms emit radiation because their __________ are unstable.

The ____________ number is the number of protons and neutrons in an atom of an element.

How does fission lead to a nuclear chain reaction?

What is the title of Unit 4?

The accidental discovery of the cathode ray tube led to what invention?

The chemical behavior of an element is determined by the number of ____________ its atoms contain.

How many neutrons are found in Copper-65?

Who determined the mass of the neutron is nearly equal to that of a proton?

Who determined the charge of an electron?

What does the following picture represent?

What is the avg. atomic mass of oxygen if, in nature, it is 99.76% Oxygen-16, 0.040% Oxygen-17 and 0.20% Oxygen-18?

The special name given to elements with an atomic number greater than 92 is

Nuclei that fall inside the __________ are considered stable (resistant to change).

Who identified the atomic number?

If the atom were the size of two football fields, the nucleus would be about the size of

Which list is correct for nuclear emissions from greatest to least penetrating power?

The half-life of thorium-234 is 25 days. How many half-lives did the sample go through at the end of 100 days?

How many protons does Iridium-192 have?