Elements and the Periodic Table

Metallic character in elements ________ across a period from left to right.

What did the blank spaces in Mendeleev's periodic table represent?

have properties somewhere between the metals and nonmetals

Not one of the alkali metals but has the same number of valence electrons

horizontal rows on periodic table

valence electrons are held strongly,they are brittle and poor conductors of heat and electicity

As you move from left to right, the size of the atoms ____________.

Why are the noble gases are very stable and reluctant to bonding with other elements?

Elements in the same ________of the periodic table have the same number of valence electrons.

suggested arranging the elements in order of increasing atomic number

the repeating of element properties with some characteristic such as increasing atomic mass

make-up 3/4 of the periodic table; their valence electrons are held loosely

As you move from top to bottom, conductivity of the elements _________

equal to the number of protons in the nucleus of an atom

As you move from left to right on the periodic table, conductivity ______

the Father of the Periodic Table; arranged the elements in order of increasing atomic mass

a special system used to illustrate the arrangement of valence electrons

a table of chemistry elements that is arranged in order of increasing atomic number

As you move from top to bottom, the size of the atoms of those elements