How many anions are needed to form the compound sodium carbonate?

Afamily is one another name for a group on the table of elements.

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?

Amap that uses a range of colors and shading to represent the elevation, depth, or landscape of specific features on earth is a/an map.