Me a lens with a surface that curves outward like the exterior of a sphere is (points : 1) reflected refracted concave convex

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

What do elements in a family tend to share. a.) similar periods b.) similar groups c.) similar atomic symbols d.) similar chemical properties and characteristics