A chemist is identifying the elements present in a sample of seawater. What characteristic of an element's atoms always determines the element's identity?

Jewelweed, a flowering plant, has seed pods that burst open when touched and forcefully eject their seeds. these structures are favorable because they a. can cause genetic changes to occur. b. prevent germination within the seed pod. c. aid in the dispersal of the species. d. attract insects that aid in pollination.

Compare and contrast the bohr model and the electron cloud models of the atom.

Arrange the elements in order of increasing electronegativity. use the periodic table to you arrange the elements. p o k mg