If an object has more positive charges than negative charges, the object has an overall?

Which of the following is an example of a parasite?

Which substances have the lowest melting points: ionic covalent, or metallic

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?