What is the name of the attraction that holds ions together in an ionic bond?

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?

Which of the following is in the lanthanide family? a) uranium b) promethium c) silver d) gold

The graph shows one consequence of urban sprawl. how did urban sprawl contribute to the change in biodiversity