Which rule for assigning oxidation numbers is correct? Hydrogen is usually –1.
Oxygen is usually –2.
A pure group 1 element is +1.
A monatomic ion is 0.

List four observations that indicate that a chemical reaction may be taking place

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent

Titration reveals that 11.6 ml of 3.0m sulfuric acid are required to neutralize the sodium hydroxide in 25.00ml of naoh solution. what is the molarity of the naoh solution?