Periodic table Flashcards
Define electronegativity ? (EN)
An atoms ability to attract electrons
Characteristics of ionic compound
- Hard
- Bittle
- High melting point
- Cant conduct electricity in solid state
The name for outer (bonding) electrons in atoms ?
Valence e-
When can ionic compounds conduct electricity ?
Can conduct in liquid / aqueous state
What is an ion ???
When an atom loses or gains electron it becomes an ion
What microscope can allow humans see atoms
Scanning tunnelling microscope
Maximum number of electrons hold in each shell formula
2n * (*= 2)
Electrons are most attracted to the nucleus
When they are close to the nucleus
Fireworks
Heat
How many different element is their
And how many are not found naturally on earth
118
26
How is the atomic number found
= no. of protons
The heaviest natural element
Is uranium
What is the ionic formula for sodium oxide
Na,O
, =2
Monatomic
Are noble gases monatomic ?
Atoms that exist on their own without bonding with other
Why is noble gases so stable
Because of their electron configuration
Bonds are form when ?
Atoms reaction , Gain and lose so this results in getting 8 election why do this
So it has the same configuration and stability as noble gases
The transfer or sharing of electrons
Metallic bonding occurs between
Factors -
Metal atoms
Weak bond with valence electrons
Sea of loose e- surrounded by positive ions
Malleable , ductile , conductor of heat and electricity
Ionic bonding occurs between
Factors -
Metals and non-metals
Involves a cation attracting an anion
Covalent bonding occurs between
Factors
Non-metals
Atoms are
Neutral
Positively charges ions
Cations
They are form when metals lose electrons
Negatively charged ions
Anions
They are formed when non-metals gain electrons
Example of Au , Zn , Pb
Metallic bonding
NaCl CaC03 KOH
Ionic binding
CO2 H2O NH3
Covalent bonding
What is the ionic formula for sodium oxide
Na,O
, =2
Monatomic
Are noble gases monatomic ?
Atoms that exist on their own without bonding with other
Why is noble gases so stable
Because of their electron configuration
Bonds are form when ?
Atoms reaction , Gain and lose so this results in getting 8 election why do this
So it has the same configuration and stability as noble gases
The transfer or sharing of electrons
Metallic bonding occurs between
Factors -
Metal atoms
Weak bond with valence electrons
Sea of loose e- surrounded by positive ions
Malleable , ductile , conductor of heat and electricity
Ionic bonding occurs between
Factors -
Metals and non-metals
Involves a cation attracting an anion
Covalent bonding occurs between
Factors
Non-metals
Atoms are
Neutral
Positively charges ions
Cations
They are form when metals lose electrons
Negatively charged ions
Anions
They are formed when non-metals gain electrons
Example of Au , Zn , Pb
Metallic bonding
NaCl CaC03 KOH
Ionic binding
CO2 H2O NH3
Covalent bonding
Protons + neutrons =
Mass number