Our Atomic World LP1 Crossword

The smallest particle of matter still retaining the characteristics of the element
The number of protons in an atom is also known as the elements________ Number.
A tiny particle with a negative electrical charge which orbits the nucleus of an atom.
The class of matter in which there are 118 different varieties on the Periodic Table
The neutral or no charge particle of an atom
The center of an atom
A positive charged particle in the nucleus of an atom
A radiation particle coming from the nucleus of some atoms is an ______ particle
A negative particle identical to an electron but radiating from a decaying nucleus is a_______particle.
A bundle of energy that is released from nuclei and can pass right through a person.
The total number of protons plus neutrons in an atomic nucleus also known as atomic weight.
What like poles of a magnet do.
What opposite poles of a magnet do.
List of elements and their properties, symbol, name and atomic number
First element of the periodic table. Symbol H
Second element on the periodic table. Symbol He
State of matter that has a definite shape,size and mass
State of matter where the atoms are able to move around and take the shape of the container.
State of matter free to fill in all the space of it's container.
The process by which a substance gives off penetrating particles.
Professor who accidentally discovered radioactivity
Substances which, after being exposed to sunlight, will glow in the dark.
A form of an atom that has the same atomic number and same chemical properties but different atomic mass.
A particle one-eighth the mass of protons. there charge can be positive +, negative - or zero 0.
A neutral particle of nearly zero mass, produced by decaying nuclei.
A nuclear particle of the mass of an electron but with a possitive charge.
Instrument used to determine the intensity of a radioactive sample is called a_______counter.
One way of measuring amounts of radiation is the _______ Cloud Chamber.
Radioactive element number 92 on the Periodic Table with a symbol of U.
Marie and Pierre Curie discovered a new radioactive element and named it after her homeland. Element 84, symbol Po.
Becquerel's discovery was caused by a piece of Uranium ore being put in his desk with a_______Plate.
Reaction that continues to feed itself and keep itself going is a ______reaction.
A spontaneous nuclear reaction like a bomb is called __________ mass explosion.
Nuclear reaction producing lighter elements and energy.
nuclear reaction producing heavier elements and energy.
Physicist who won the Nobel Prize in 1938 and helped create the first nuclear reactor.
Energy produced by means of a nuclear reactor is called_________energy.
A basic unit of measuring the amount of radiation being given in one second is named the_______after Marie Curie.
The other unit of measuring radiation is called the________ after William Roentgen.
The effect heated water will have on the environment when returned to it's source is called__________effects.