A memo or memorandum means reminder.

number of protons

Sum of all of chemical reactions that occur in the body

positively charged ion

Bond caused by attraction which holds together ions with opposite charges

unstable isotopes whose nuclei decay into a stable configuration

Poor mothering is the main cause of sudden infant death syndrome (SIDS).

For Erikson, each life stage is characterized by a particular:

In collectivist cultures, people tend to:

Brain plasticity decreases as people age.