The ability to be made into wire is called ____.
ductility
Why do we use metals to make our pots and pans?
metals conduct heat
Which group has only 2 valence electrons?
Alkaline earth metals
An element's reactivity has to do with which subatomic particle?
electrons
Which two groups of elements are located UNDER the rest of the table?
actinides and lanthanides
The ____ group of nonmetals are harmful to humans when not found in compounds.
The Halogens. For example, Chlorine
____ was the scientist who developed the periodic table.
Dmitri Mendeleev
True or False: Most of the nonmetals are solid at room temperature.
False. Most are gases.
When an element can be a conductor one minute and an insulator the next, it is called a ____.
Semiconductor
Where are the nonmetals located on the periodic table?
on the right side
Which side of the periodic table has LESS reactive elements?
right side
What did Dalton's atomic model look like?
a billiard ball - round and smooth
True or False: Alkali metals are not found uncombined in nature.
True
Which family has characteristics of both metals and nonmetals?
Metalloids
The Noble Gases have ___ valence electrons.
8
____ is the most commonly found metalloid on Earth.
Silicon
___ is the group of elements beside the Noble Gases.
The Halogens
What did Thomson's atomic model look like?
the raisin or blueberry muffin model -- mostly positive with dots of negatives