Explain why metallic elements bend, while solid and non-metallic elements break or crumble?

Explain how global warming could have affected yellowstone frog and salamander habitat's, resulting in changes in the populations of these species

1) a light bulb takes in 30 of energy per second. it transfers 3j as use energy. calculate the efficiency. second. it transfers 3j as useful light energy and 27j as heat energy. calculate the efficiency

How much mass would a mole of hydrogen molecules contain? recall that hydrogen is diatomic. g/mol