Answer:Mass number - Atomic Number = Neutrons
Explanation:
Answer:
Hey there can you post the complete question ,i cannot find any element
Answer:
- Option <em>A), Planck.</em>
Explanation:
The first scientist to propose that an object could emit only certain amounts of energy was <em>Max Planck</em>.
Incandescent (very hot) objects emit different color of lights, i.e. different wavelengths, but by 1900 it was believed that the light (energy) was emitted in a continuous way.
Since the wave model did not explain the emission of such specific wavelengths, when the German physicist <em>Max Planck</em> (1858 - 1947) studied the light emitted by incandescent objects, he proposed that the objects (the matter) could gain or lose energy only in small specific amounts or packages of energy called quanta (plural of quantum).
Planck, later, established the mathematical relation between the energy of a quantum of light with the frequency of such the radiation (light emitted). This is the formula:
Where, E is the energy, h is Planck's constant, and ν is the frequency.
Answer:
The electrons farthest from the nucleus of the atom.
hope this helps!
Answer:
HBr
Explanation:
Acidity is directly proportional to non metallic character. Moving from left to right and down the group non metallic character increases hence acidic strength increases. Based on this explanation HBr is strongest acid among given compounds.
