Section 1
Section 2
Section 3
Section 4
Section 5
100
the smallest particle of an element
What is an atom
100
deleev tried various arrangements of cards
What is the atomic mass
100
the ability of an object to transfer heat or electricity to another object
What is Conductivity
100
an element that lacks most of the properties of a metal
What is a nonmetal
100
The name that Marie gave to this spontaneous emission of radiation by an unstable atomic nucleus
What is Radioactive
200
A negatively charged particle that is found outside the nucleus of an atom
What is an electron
200
A one or two-letter representation of an element
What is a chemical symbol
200
A class of elements characterized by physical properties that include shininess
What is metal
200
A molecule consisting of two atoms
What is a diatomic molecule
200
The process in which the atomic nuclei of unstable isotopes release fast-moving particles and energy
What is radioactive decay
300
The central core of the atom, containing protons and usually neutrons
What is a nucleus
300
A chart of the elements showing the repeating pattern of their properties
What is a periodic table
300
A term used to describe material that can be pounded into shapes
What is malleable
300
An element found in Group 17 of the periodic table
What is halogen
300
A type of nuclear radiation consisting of two protons and two neutrons
What is an alpha particle
400
A positively charged particle that is part of an atom’s nucleus
What is a proton
400
A horizontal row of elements in the periodic table
What is a period
400
A term used to describe a material that can be pulled out into a long wire
What is a ductile
400
An element in Group 18 of the periodic table
What is noble gasses
400
A fast-moving electron that is given off as nuclear radiation
What is beta particle
500
A region of an atom in which electrons of the same energy are likely to be found
What is an energy level
500
Elements in the same vertical column of the periodic table
What is a group
500
The ability of an object to transfer heat or electricity to another object
What is conductivity
500
An element that has some characteristics of both metals and nonmetals
What is metalloid
500
A type of nuclear radiation made of high-energy waves
What is gamma radiation
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