Metals form generally forms ionic bonds as in salts.
Carbon form covalent bonds, for ex.
sodium on its own is neither it is simply an element. When in a compound it will always be ionic as sodium is a metal
Iron is not a compound, it is a metallic element.
P2O5 is not an element. It is a compound with polar covalent bonds.
Phosphorus is a chemical element, not a compound.
Ca (calcium) is an element, not a compound. and it can only form ionic compounds.
No, F2 is covalent but it is an element, not a compound.
SiF4 is a polar covalent compound
K is an element. It is elemental Potassium metal.
P2O5 is not an element. It is a compound with polar covalent bonds.
this an organic compound so it is covalent but acid is always covalent compound either organic or inorganic.
P4O4 is not a chemical compound. P4O10 is a covalent compound. P and O always form covalent bonds.
Xe is an inert element that can't be combined in a chemical compound to form neither ionic or covalent bond.