Arranging the elements in the periodic table
Terms in this set (23)
An arrangement of the elements in which atomic weight increases from left to right and elements with similar properties appear in columns called families and groups.
Horizontal rows in the periodic table
Columns in the periodic table
Elements in the middle of the periodic table, in groups 3-12.These are all metals.
14 metal elements with atomic numbers from 58 to 71
14 elements with the atomic numbers from 90-103. Most of these are man made and some are radioactive. (f-block)
abbreviations for the chemical elements
Any metal in Group 1A of the periodic table
alkaline earth metals
Metallic elements in group 2 of the periodic table which are harder than the alkali metals and are also less reactive
A nonmetal in Group 7A of the periodic table
Gaseous elements from group 8
Number of protons in an atom nuclues
the sum of the number of neutrons and protons in an atomic nucleus
the positively charged dense center of an atom
A subatomic particle that has no charge and that is found in the nucleus of an atom
A subatomic particle that has a positive charge and that is found in the nucleus of an atom
A subatomic particle that has a negative charge
The electrons in the outermost shell (main energy level) of an atom; these are the electrons involved in forming bonds.
Regions around the nucleus in which given electron or electron pair is likely to be found
electron shell numbers
2 in the first shell ,then 8 afterwards
tells you how many electrons are in the valence shell
tells you the amount of shells in each period( e.g. period 3 has 3 electron shells)
Atoms that have gained or lost electrons
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