The oxidation state of an atom is the fictitious charge that an atom would have if all bonds between atoms of different elements were 100% ionic. Thus, oxidation is better defined as an increase in oxidation state, and reduction as a decrease in oxidation state.
Most babies take their first steps sometime between 9 and 12 months and are walking well by the time they're 14 or 15 months old. Don't worry if your child takes a little longer, though. Some perfectly normal children don't walk until they're 16 or 17 months old.
Ages & Stages - Toddlers. When children learn to walk, they are called toddlers. Usually this term is applied to one and two year old children. The toddler stage is very important in a child's life. It is the time between infancy and childhood when a child learns and grows in many ways.