How does the number of valence electrons in atoms of metalloids explain why metalloids are semiconductors?

they have one or two valence electrons, so they cannot lose electrons easily.

they have one or two valence electrons, so they can lose or gain electrons.

they have three to six valence electrons, so they cannot lose electrons easily.

they have three to six valence electrons, so they can lose or gain electrons

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.

(**i would really appreciate if this was answered soon** ) which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

Avolcano erupts next to a grassland area in a valley. a. describe three ways in which material released by the volcano could impact the grassland area. b. describe three ways in which the grassland ecosystem could recover after a volcanic eruption.