Answer:
acidic
Explanation:
because the lower you go on the scale the more acidic it is and the closer to the middle the more neutral it is
Answer:

Explanation:
The refractive index of a medium is given by the following formula:

where,
η = refractive index = 1.5
= angle of incidence = ?
= angle of refraction = 15°
Therefore,


each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.