In the Bohr Model of the Atom

question 77

Multiple Choice

In the Bohr model of the atom

• A) gravitational forces play a significant role.
• B) electrons do not radiate energy when they are in a stable orbit.
• C) the electrons spiral into the nucleus.
• D) the energy of an electron in a stable orbit is an integral multiple of h/2π).
• E) None of these is correct.

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Definitions:

Etching

A kind of engraving in which the design is incised in a layer of wax or varnish on a metal plate. The parts of the plate left exposed are then etched (slightly eaten away) by the acid in which the plate is immersed after incising. See also drypoint, intaglio.

Engraving

The process of incising a design in hard material, often a metal plate (usually copper); also, the print or impression made from such a plate.

Vanishing Point

A point in the perspective drawing at which parallel lines receding from an observer seem to converge and at which they would meet if extended.

Moveable Type

A system of printing and typography that uses movable components to reproduce the elements of a document.