Atomic Structure Test Flashcards
the vertical columns on the periodic table are called ________
groups
the horizontal rows on the periodic table are called ________
periods
Most elements in the periodic table are labeled as _______
metals
the elements that touch the zigzag line are classified as _________
metalloids
the elements in the far upper right corner are classified as _______
non-metals
these elements are often called semiconductors and are used in electronic devices.
metalloids
Hydrogen is the only one of these that is not on the right side of the periodic tables.
gas
These elements are often shiny and are good conductors of heat and electricity.
metals
elements in the first group have one valence electron and are extremely reactive they are called ________
Alkali metals
Elements in the second group have 2 valence electrons and are also very reactive. They are called.
Alkali earth metals.
Elements in groups 3 through 12 have many useful properties and are called __________
transition metals
elements in group 17 are known as salt formers. They are called _________
halogens
Elements in group 18 are very unreactive they are said to be inert. We call these _________
noble gases
Elements in this group are the most reactive nonmetals.
Halogens
If two elements are in the same group the one closer towards the bottom is ________
more reactive
