metals
very reactive solids that combine with almost any other elements
alkali metals
only nonmental in this group used to make boric acid and borax laundry powder
boron
metalloids are metallic elements : true or false
false, they are nonmetallic elements
very dense radioactive metals with seven energy levels which combine directly with most non metals
actinides
non metallic element used in bleach
chlorine
these metals are hard, shiny, malleable and ductile. Most of them are very stable used in everyday life
transition metals
the tissue of all living things is made of this element
carbon
which of the following elements is a metalloid: aluminum or silicon
silicon
symbol for technetium
Tc
this group has 5 valence elements in their last shell
nitrogen group
metals that have two valence electrons
alkaline earth metals
21 % of air is made of this element from this group. The name of the group of this element is
chalcogen group
the chemical symbol for antimony
Sb
elements that follow uranium in the periodic table are called _______________________
transuranium
this element is the only nonmetal liquid of the periodic table
bromine
these elements that belong to the f block and have 6 energy levels are relatively soft, have high melting and boiling points, are very reactive and used in lasers .
lanthanides
noble gases
the area where metalloids are located is called ______of the periodic table
staircase
name of two examples of artificial elements in the periodic table
promethium, technetium, plutonium
when alone, they exist as diatomic molecules so that they satisfy the octet rule. This is the only group that includes elements in the three states of matter.
halogens
this type of elements produce alpha and beta particles, gamma radiation, unstable nuclei
radioactive elements
the most reactive element of nonmetals
fluorine
metalloid element used as poison for rats
arsenic
rare earth elements in the six period that are widely used in lasers
lanthanides
this group contains the most abundant gas in the atmosphere
nitrogen group