chemical change and electrical

Resistance

ratio of potential difference across it to the current flowing through it.

Potential difference

work done per unit charge in charges

Current

rate of flow of charge

oxidation

when a substance gains oxygen in a chemical reaction

thermal decomposition

when a substance breaks down into two or more simpler substances upon heating

neutralisation

acid + alkali

combustion

when a substance is heated or burnt in the presence of oxygen to form one or more new substances

electrolysis

decomposition of compounds into simpler substance using electrical means

Electroplating

proccess of coating a metallic object with a different layer of metal using electrical means

photodecomposition

when exposed to light, certain substance will break down into simpler substances.

covalent bonding

Non-metallic atoms sharing valence elctrons

ionic bonding

when a metal reacts with a non-metal, the metallic atom will transfer their valence electrons to the non-metalic atoms

acid

hydrochloric ___ , sulfuric ____, nitric ____

alkali

sodium hydroxide, potassium hydroxide, calcium hydroxide

potential difference (formula)

work done / charge

current (formula)

charge / time

resistance (formula)

potential difference / current

rheostat

variable resistor

resistor in series

Rt = R1 + R2 +…..

resistor in parallel

Rt = (1/R1 + 1/R2 +…..)^-1

power

amount of electrical energy used for conversion to other forms of energy per unit time