Halophiles Choose one: A. must have 0.2%–5% NaCl levels to grow. B. require halogen elements in large quantities. C. live in the ocean. D. must have 10%–20% NaCl levels to grow.

How many neutrons does a atom of cobalt have?

Using the periodic table, complete the table to describe each atom. type in your answers

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next