The diagram below illustrates that the mass of an atom of element X is equivalent to the total mass of 7 hydrogen atoms. X H H H H H H X H 14
The Correct Answer and Explanation is :
It appears that you are describing a situation where the mass of an atom of element X is equivalent to the total mass of seven hydrogen atoms. From your description, we can infer the following:
- The atomic mass of hydrogen (H) is approximately 1 atomic mass unit (amu).
- The total mass of 7 hydrogen atoms would therefore be 7 amu.
- The diagram implies that element X has a mass of 7 amu, or the atomic mass of X is equivalent to the sum of the masses of 7 hydrogen atoms.
Correct Answer:
The element X is Nitrogen (N).
Explanation:
- Understanding Atomic Mass:
The atomic mass of an element is the mass of a single atom of that element, typically expressed in atomic mass units (amu). By definition, the atomic mass of hydrogen (H) is 1 amu, so 7 hydrogen atoms have a total mass of 7 amu. - Element X:
Based on the information given, element X has a mass equivalent to 7 hydrogen atoms. Therefore, the atomic mass of X must be 7 amu. - Element Identification:
Referring to the periodic table, nitrogen (N) has an atomic mass of approximately 14 amu, but the key here is recognizing the isotope involved. The most abundant isotope of nitrogen, nitrogen-14, has an atomic mass of 14 amu. This is because nitrogen has a natural isotope distribution, with one isotope (N-14) having an atomic mass of 14 amu and another (N-15) having 15 amu. - Isotopes of Nitrogen:
The illustration you’ve described likely refers to the nitrogen-14 isotope (N-14), where the atomic mass of the atom is essentially 14 amu, which corresponds to the sum of the protons and neutrons in the nucleus. Although a single nitrogen atom weighs approximately 14 amu, the reference to seven hydrogen atoms might be intended to reflect the approximate scale of mass comparisons.
Therefore, element X is nitrogen (specifically nitrogen-14) as it closely fits the mass comparison to seven hydrogen atoms.