When a Small Amount of Silver Is Added to Zinc

question 171

Multiple Choice

When a small amount of silver is added to zinc sulfide as an activator,the band gap of the resulting material is approximately 266 kJ/mol.If it were used as a light-emitting diode,what color of light would be emitted?

• A)ultraviolet
• B)infrared
• C)red
• D)yellow
• E)blue

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Definitions:

Heterozygous

Having two different alleles for a particular gene, one inherited from each parent.

Allelic Form

Variations of a gene that occur in the same place on a chromosome.

Recessive Allele

An allele that produces its characteristic phenotype only when its paired allele is identical.

Dominant Allele

A dominant allele is one version of a gene that masks the presence of a recessive allele in the pair, meaning the trait it represents is expressed even when only one copy is present.