10 Which types of orbitals are found in the principal energy level n = 4?
Ο Α. .
s, d
OB.
s, p, d,
O C. SP
OD. s, p, f
O E. s, d, f
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2. how is heavy water different from normal water

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

Which of the following units is not an official si unit