Which of the following elements is classified as a halogen?
a. b
b. ba
c. be
d. br

The drawing represents the movement of particles in a substance. what changes of state can this substance undergo

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?

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned