An Atom That Contains 20 Protons,21 Neutrons,and 20 Electrons Has

question 40

Multiple Choice

An atom that contains 20 protons,21 neutrons,and 20 electrons has an atomic mass of

• A) 20
• B) 41
• C) 40
• D) 61

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Definitions:

Shortened Eyeball

An eyeball that is shorter than normal, often associated with hyperopia or farsightedness.

Light Rays

Streams of photons, which are elementary particles of light, that travel in straight lines and are visible when they encounter an object or substance.

Magnifying Lens

An optical lens or device designed to enlarge the appearance of objects viewed through it.

Light Source

Any device or natural entity that emits light, used to illuminate environments or as part of visual presentations.