atoms and periodic table (ST) Flashcards
What are atoms made of?
An atom is made up of
three subatomic particles; electrons, protons, and neutrons.
What is found inside the nucleus?
Protons and neutrons
Name 5 properties of metals
Good conductors of heat and
electricity
Ductile and malleable
Shiny
Solid at room temperature (except
Mercury)
React with acids
Found to the left of the staircase
Name 5 properties of Non-metals
Poor conductors of heat and electricity
Many are liquid at room temperature
If solid, can be easily reduced into a
powder
Located to the right of the staircase,
adding hydrogen.
Name 3 properties of Metalloids
Have properties of both metals and nonmetals
Used to make semi-conductors
Found alongside the staircase
What column is Alkali
metals found in and name its properties.
Found in column 1
It is also
Soft and highly malleable
Stored in oil because they react to moisture in the air
Combine to form molecules
What column is Alkali earth
metals and names its properties?
Found in column 2
Soft and reactive
Can be exposed to air
Combine to form compounds
what column are Halogens found in and what are halogens commonly used for?
Found in the second to last column
Nonmetals
Combine to form compounds
Disinfectants
what column is Noble gases found in.
Found in the last column
Unreactive
Exist alone
what column is Noble gases found in?
Found in the last column
Unreactive
Exist alone
What is the missing coefficient?
cu+ 02 = 2 CuO
2cu+02= CuO
What does the number of shells represent in the Rutherford-Bohr models?
The number of shells an
atom has, is indicated by the period (row) it is in on the periodic table.
What is represented in lewis notation
Lewis notation is a simplified representation of the atom, in which only
valence electrons are illustrated. Valence electrons are the electrons gravitating
around the nucleus of the atom in the last energy shell.
where is the electron located?
It is located outside of the nucleus in the electron shells, the further it is from the nucleus the
less energy holds it to the nucleus. The electrons on the last energy shell of an
atom are therefore the ones that will be shared or moved when atoms combine to
form molecules or during stating electricity.
What is a valence electron?
Electrons located on the outer shell, these electrons can be shared or transferred to fill out the last shell.