element A B C D have atomic numbers 1, 8, 11 & 19 respectively choose the odd number and give reason for your Answer

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

When the water vapor cools it condenses select a number that represents his process on the

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?