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

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?

What is an example of a physical property?

Identify and describe the three ways that mutations affect organisms.