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Chapter 4 Vocabulary

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period:
date:
Across
Group 7A(17) elements of fluorine, chlorine, bromine, iodine, and astatine.
A neutral subatomic particle having a mass on 1 amu and found in the nucleus of an atom.
The smallest particle of an element that retains the characteristics of the element
An abbreviation that represents the name of an element
An element located between groups 2 and 13 on the periodic table
A small mass unit used to describe the mass of very small particles such as atoms and subatomic particles. 1 amu is equal to one-twelfth the mass of a carbon-12 atom
An atom that differs only in mass numbers from another atom of the same element . They have the same number of protons, but different number of neutrons.
The compact, very dense center of an atom, contains the protons and neutrons of an atom
An element found in group 1 through 18 excluding groups 3-12 of the periodic table.
The weighted average mass of all the naturally occurring isotopes of an element
An abbreviation used to indicate the mass number and atomic number of an isotope
A horizontal row of elements in the periodic table
Down
Group 2A Earth Metals
A particle within an atom; protons, neutrons, and electrons
Elements with properties of both metals and nonmetals located along the heavy zig zag line of the periodic table
A number that appears at the top of each vertical column on the periodic table
An element that is shiny, malleable, ductiile and a good conductor of heat and ekectricity
A number that is equal to the number of protons in an atom
An element that is not shiny and is a poor conductor of heat and electricity.
An element in group 8A (18) of the periodic table, generally and nonreactive and seldom found in combination of other elements
A positively charged sub atomic particle, having a mass of 1 amu and found in the nucleus in an atom
An abbreviation that represents the name of an element.
A negatively charged subatomic particle having a very small mass that is usually ignored in mass calculations
An arrangement of elements by increasing atomic number such that elements having similar chemical behavior are grouped in vertical colums
Elements of group 1A (10 except for hydrogen. Soft, shiny metals