Below is a representation of the unit cell for nickel(II) oxide.How many O2? anions are there in the unit cell? 
Definitions:
Childhood-Onset
The initiation or appearance of symptoms or conditions during the early years of a person's life.
Adult-Onset
Conditions or diseases that begin in adulthood, as opposed to those that are congenital or that develop during childhood.
Anxiety Disorders
A group of mental health disorders characterized by significant fear or anxiety that interferes with daily activities.
Mood Disorders
Psychological disorders characterized by the elevation or lowering of a person's mood, such as depression or bipolar disorder.
Q3: A thermoplastic polymer can be melted and
Q7: The general electron configuration for atoms of
Q28: Which substance has the lowest vapor pressure
Q74: Only valence electrons are shown in the
Q74: Polyethylene plastic consists of long chains of
Q87: Liquid ammonia can be used as a
Q90: Use the VSEPR model to predict the
Q106: Nitrogen dioxide decomposes according to the reaction
Q108: Assuming ideal behavior,what is the density of
Q119: A(n)_ can be added to a solution