The alkali metals all have
a- 4 electrons in their outer energy level
b- 3 electrons in their outer energy level
c- 2 electrons in their outer energy level
d- 1 electron in their outer energy level

How much energy is made when a pice of wood burns. how do you know

What human activity increases beach erosion?

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world