All of the alkali earth metals, Group 2, have two valence electrons. Which of these would represent the oxidation number of the alkali earth metals such as magnesium and calcium?

A) - 6

B) - 2

C) + 2

D) + 6

A student heats a test tube containing a large amount of protein and notices a colour change. Why does heating causes colour change?

Where in the sun does the product of energy take place?

What if the first triplet as CAA?

Which of these corrects the shift of voice in the following sentence? Nakamura was praying for protection when the front door was flung open by force. Nakamura was praying for protection when the front door was flung open by the police.

Que utilidad tiene el ciclo de krebs para los seres vivos

Why might a water table drop

How did the 1898 discovery of blood types affect society?

Which of the following is a feeding source for fens? aquifers dexfoliants exfoliants nitrates

What system includes oceans, lakes, rivers, and groundwater? a. geosphere b. hydrosphere c. atmosphere d. biosphere

Fungal spores a. are only asexually produced. b. cannot be seen in a light microscope. c. are used to identify fungi. d. are produced by molds but not by yeasts. e. are only produced under harmful environmental conditions