FOS-C Atoms & Periodic Table Section D
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21 Terms
How many elements were there in the first periodic table?
60
Who is credited with creating the first periodic table?
Dimitri Mendeleev
How was the first periodic table organized?
by atomic mass
How is the periodic table organized now?
by atomic number
What did Mendeleev notice when he was making his periodic table?
he noticed repeating chemical patterns
What was Mendeleev able to do through his periodic table?
predict future elements
The periodic table is a display of elements organized by which three things?
atomic number, electron configuration, and recurring chemical properties
What family is group 1?
alkali metals
What family is group 2?
alkali earth metals
What family is group 3-12?
transition metals
What family is group 17?
halogens
What family is group 18?
noble gases
With the zigzag staircase, metals are found to the ____ of it.
left
With the zigzag staircase, nonmetals are found to the ____ of it.
right
With the zigzag staircase, where are metalloids/semimetals found?
on it
Which of the following is the rarest: metals, nonmetals, and semimetals?
semimetals
Which element should be a semimetal by location but is actually a metal?
aluminum
What are the properties of metals?
shiny/luster
malleable/ductile
good conductor
What are the properties of nonmetals?
no luster
various colors
brittle when solid
bad conductors
What are the properties of semimetals?
mix of nonmetals and metals
What are the two exceptions to the periodic table trends?
hydrogen and helium