11. Chemistry Review Flashcards
How many electrons can each shell contain?
2, 8, 18, 32
2n^2
What does the period and group number of an element indicate?
Period number- how many electron shells it has
Group number- how many valence electrons it has
What is the periodic law?
The observation that the physical and chemical properties of the elements occur at regular intervals when the elements are listed in order of atomic number.
What are some properties of metals? LADMA
Lustrous Able to conduct heat and electricity Ductile Malleable All solid at room temperature except for Mercury
What are the properties of nonmetals?
Not malleable
Not ductile
Not etc
Solid liquid or gas
How does metallic bonding work?
The outer electron of metal moves around the lattice of positively charged metal ions, the electrostatic attraction between positive and negative holds electrons together.
What are cations and anions?
Cations are positively charged metal ions
Anion are negatively charged ions
What are some properties of salts? (Ionic compounds)
They are usually solid at room temperature but don’t conduct electricity in their solid state
They have high melting points
They dissolve in water and the ions separate to their aqueous solutions will normally conduct electricity.
What is covalent bonding?
Covalent bonding occurs when electrons are shared between non metallic atoms and they bond to each other and form discrete groups of atoms called a molecule.
