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Introduction to Atoms
Organizing the Elements
Metals
Nonmetals and Metalloids
Radioactive Elements
100
The smallest particle of an element.
What is an atom?
100
The average mass of all the isotopes.
What is the atomic mass?
100
The ability of an object to transfer heat or electricity to another .
What is Conductivity?
100
A nonmetal is an element that lacks most of the properties of a metal.
What is a nonmetal?
100
The atomic nuclei of unstable isoptopes release fast moving particles and energy.
What is radioactive decay?
200
Rutherford named these positively charged particles in the nucleus of an atom.
What is a proton?
200
The letters below the atomic number.
What is a chemical symbol?
200
The ease and speed with which an element combines, or reacts, with other elements and compounds
What is reactivity?
200
Consists of two atoms.
What is a diatomic molecule?
200
Consists of two protons and two neutrons and is postitively charged.
What is an alpha particle?
300
An electrons movement is related to its what.
What is an energy level?
300
Plasma is a state of matter that consists of a gas-like mixture of free electrons and nuclei of atoms that have been stripped of electrons.
What is plasma?
300
The destruction of a metal.
What is corrosion?
300
An element found in Group 17 of the periodic table.
What is halogens?
300
A fast-moving electron that is given off as nuclear radiation.
What is beta particle?
400
Since it was electrically neutral the particle is a what?
What is a neutron.
400
A process in which two atomic nuclei combine, forming a large nucleus and releasing huge amount of energy.
What is nuclear fusion?
400
Move atomic nuclei faster and faster until they have reached very high speed.
What is Particle accelerators
400
An element in Group 18 of the periodic table.
What is noble gases?
400
A type of nuclear radiation made of high-energy waves.
What is Gamma radiation?
500
The unique number of protons in the nucleus of an atom is an elements what.
What is an atomic number?
500
The horizontal rows in the periodic table.
What is the periods on the periodic table?
500
The elements in group 3 through 12.
What is transition metals?
500
An element that has some characteristics of both metals and nonmetals.
What is metalloids?
500
A radioactive isotope that can be followed through the steps of a chemical reaction or industrial process.
What is tracers?