Chemistry ยท Physics

Atomic Structure and Mass

277 Questions

Atomic structure and mass focus on the composition of atoms, including protons, neutrons, electrons, and isotopes. This topic is essential for the chemistry sections in engineering and civil services competitive exams. Review these questions to practice calculating atomic mass, neutron count, and isotopic distributions.

Atomic mass unit calculationsNeutron and proton countsIsotopic distribution averagesLaw of triadsRest energy of atoms

Atomic Structure and Mass Questions

Multiple choice

The law of multiple proportions states that when two elements combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element are in a simple ratio.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The law of multiple proportions states that when two elements combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element are in a simple ratio.

Multiple choice

What is the detection limit of Atomic Absorption Spectroscopy?

  1. 10-100 ppb.

  2. 1-10 ppb.

  3. 0.1-1 ppb.

  4. 0.01-0.1 ppb.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The detection limit of Atomic Absorption Spectroscopy is typically in the range of 0.01-0.1 ppb.

Multiple choice

What is the mass of the Great Wall?

  1. About 10^16 solar masses

  2. About 10^17 solar masses

  3. About 10^18 solar masses

  4. About 10^19 solar masses
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Great Wall is estimated to have a mass of about 10^16 solar masses, which makes it one of the most massive structures in the universe.

Multiple choice

What is the mass of a typical supercluster?

  1. 10^12 solar masses

  2. 10^14 solar masses

  3. 10^16 solar masses

  4. 10^18 solar masses
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

Superclusters typically have masses ranging from 10^14 to 10^16 solar masses.

Multiple choice

What is the typical mass of a globular cluster?

  1. 10,000 solar masses

  2. 100,000 solar masses

  3. 1 million solar masses

  4. 10 million solar masses
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Globular clusters typically have masses of around 1 million solar masses.

Multiple choice

What is the mass of a typical supercluster?

  1. 10^16 solar masses

  2. 10^18 solar masses

  3. 10^20 solar masses

  4. 10^22 solar masses
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Superclusters typically have a mass of about 10^18 solar masses.

Multiple choice

What is the typical density of the intracluster medium?

  1. 10^-3 atoms/cm^3

  2. 10^-2 atoms/cm^3

  3. 10^-1 atoms/cm^3

  4. 1 atom/cm^3
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The typical density of the intracluster medium is around 10^-3 atoms/cm^3.