C2.1- atoms, elements & compounds Flashcards
Identify the formula of the ionic compounds formed–
Na+ and Cl-
Mg2+ and Cl-
Ca2+ and O2-
NaC1
MgCl2
CaO
Describe the bonding in pure metals
Positive ions in a sea of delocalised electrons
What are 3 properties of metals?
Malleable
Good conductors
Strong
How would an atom with configuration 2,8,7 become an ion and what configuration would they then have
They would add 1 electron therefore would become [2,8,8]-
What is ionic bonding
A metal reacting with a non metal
What is covalent bonding
When only non metals react
What is metallic bonding
When only metals react
What is meant by ionic bonding- how does it occur
The positive and negative ions are attracted to each other- forming an ionic lattice (bond)
What is meant by covalent bonding- how does it occur
Non metal atoms sharing pairs of electrons
What is the formula of calcium sulfate(Ca2+ & SO4^2-)
CaSO4
What is the formula of sodium carbonate (Na+ & CO3^2-)
Na2CO3
Identify the formula of aluminium hydroxide (Al^3+ & OH-)
Al(OH)3
How does an atom become an ion?
It loses/gains electron(s) in order to have a full outer shell
What is the difference between a single covalent bond and a double bond?
A single covalent bond has 1 pair of electrons and a double bond has 2 pairs of electrons
What is the charge on protons, neutrons and electrons?
Protons +
Neutrons 0
Electrons -
