Subatomic Particles
This subatomic particle has no charge
Neutron
Find the element with an atomic number of 8
Oxygen
The term for atoms with the same number of protons but different numbers of neutrons
Isotopes
This type of radioactive decay turns a neutron into a proton and releases a fast-moving electron
Beta decay
This is the smallest particle of an element that retains the properties of that element
Atom
Proton
Find the element with 42 protons in its nucleus
Molybdenum
The mass number of an isotope is equal to the total number of protons and neutrons in its nucleus
Two protons and two neutrons (also called a Helium-4 nucleus)
This is calculated as the weighted average mass of all an element's isotopes
Atomic mass
This subatomic particle has a negative charge
Electron
Find the element whose atoms have 33 electrons
Arsenic
Describe the difference between the isotopes Carbon-12 and Carbon-13
Carbon-12 has 6 neutrons while Carbon-13 has 7 neutrons
This type of radioactive decay does not remove any mass from a nucleus, just energy
Gamma decay
This unit is equal to 1/12 the mass of a carbon-12 atom
Atomic mass unit (amu)
Name the subatomic particles found in the nucleus
Protons and neutrons
How many protons does calcium (Ca) have?
20
An isotope is named by combining the element's name with the isotope's _______________.
Mass number
Describe what happens during beta decay
A neutron turns into a proton and a high-energy electron is ejected from the nucleus at high speed
Define "atomic number"
The number of protons in an atom's nucleus
What keeps electrons in the area around the nucleus?
The attraction between positively charged protons in the nucleus and the negatively charged electrons
How many protons and electrons does neon (Ne) have?
Ten protons and ten electrons
State the number of protons, neutrons, and electrons in an atom of Lithium-7
Three protons, four neutrons, three electrons
An atom of Manganese-56
Why does radioactive decay occur?