The emission spectrums are known for the elements below. What elements are in the unknown sample?check all that apply

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answer : Lithium and Potassium

Explanation:

The elements that are in the unknown sample are : Lithium and Potassium

An Emission spectrum is used to determine the composition of a material and it is distinctively different for each element that us found on the period table

d) the number of neutrons plus the number of protons

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is