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Atomic Number Quizzes & Trivia

From hydrogen’s lonely little one to hassium’s hefty hundred and eight, the atomic number of an element tells you some important information about the substance under study.

What gives an element its specific atomic number – its number of protons, neutrons, or electrons? If I add one to the atomic number of neon, a gas, why do I get Na, a metal, in its place? And what does an atomic number have to do with how massive an atom of that element is? If you need to polish up your skills with the periodic table, or if you think you can already tell the atomic number for Mg from that of Mn, take our atomic number quiz and give yourself a chemistry challenge!
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An atom is a primary piece of matter made up of protons, neutrons, and electrons called subatomic particles. The atom's center is known as the Nucleus, which carries the negative charge around which electrons flow. This quiz...

Questions: 10  |  Attempts: 9272   |  Last updated: Jan 29, 2021
  • Sample Question
    If lithium has an atomic number of 3 and a mass number of 7, the correct number of protons, neutrons, and electrons, respectively, is:

Do you know anything about the number of atoms and packing efficiency? Packing fraction is the fraction of size in a crystal structure that is inhabited by constituent particles. The atomic packing factor of a unit cell is...

Questions: 10  |  Attempts: 154   |  Last updated: Jan 12, 2021
  • Sample Question
    If lithium has an atomic number of 3 and a mass number of 7, the correct number of protons, neutrons, and electrons, respectively, is:

Atoms of each element contain a characteristic number of protons in their nucleus. The number of the protons in each element is what is called its atomic number. The quiz below is designed to check whether you know the atomic...

Questions: 10  |  Attempts: 88   |  Last updated: Oct 11, 2018
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Atomic Number Questions & Answers


What is the atomic number for Helium?
It's 2 as first it's hydrogen then helium then no. 3 is lithenium
What is the correct number of protons, neutrons, and electrons, respectively if lithium has an atomic number of 3 and a mass number of 7?
3,4,3. Protons, neutrons, and electrons are the three basic parts of an atom. The electron is a negatively charged molecule that is located at the center of the atom in the nucleus. The neutron does not have any charge. The number of neutrons affect
How many protons and electrons does carbon have if it has an atomic mass of 12 and 6 neutrons?
The answer to this is 6,6. There is sometimes a need for electrons and protons to be equal when the given atom is neutral in charge. An atom has three atomic particles. The first one is the proton which has a positive charge. The second one is the el
How many protons does it has if Phosphorus has an atomic mass of 30 and 15 neutrons?
The correct answer is 15. If Phosphorous has an atomic mass of 30 and 15 neutrons the proton number is most likely 15. The mass number of of atoms in an element is equal to the sum total of the number of neutrons and protons. Since we have the atomi
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