atomic structure and the periodic table Flashcards
what is the periodic table?
a list of all the elements
who created the periodic table?
Dmitri Mendeleev
how are elements are listed?
in order of atomic number
what is a vertical column in the periodic table called?
a group
what are the horizontal rows in the periodic table called?
a period
where are the metals located in the periodic table?
the left-hand side
where are the non-metals located in the periodic table?
the right-hand side
why are the elements along the zig-zag line different?
they are metalliods and they have some properties of metals and some properties of non-metals
name some properties of metals
good conductors of heat and electricity high melting and boiling points dense malleable ductile sonorous shiny
name some properties of non-metals
insulators of heat and electricity
low melting and boiling points
light weight
dull
what are particles made up of?
subatomic particles
what are subatomic particles known as?
protons
electrons
neutrons
where are protons and neutrons founds?
in the nucleus
where are electrons found?
in shells orbiting the nucleus
what is a protons charge and mass number?
+1
1
what is a neutrons charge and mass number?
0
1
what is an electrons charge and mass number?
-1
0
the number of protons in an atom is called the…
atomic number and is the bottom number
the number of electrons is the same as the…
number of protons
the number of neutrons =
mass number - atomic number
what is the electronic configuration or structure?
writing or drawing the electrons in shells
how many electrons are in the first shell?
2
how many electrons are in the second shell?
8
how many electrons are in the third shell?
8
