11 Questions
What is the atomic mass of Carbon?
$12$
What is the number of neutrons in a Carbon atom?
$12$
How many protons are in a Calcium atom?
$20$
What is the definition of an ISOTOPE?
Atoms that have the same atomic number but different atomic masses.
What is the purpose of a particle accelerator?
To synthesize new elements.
How many vacancies were there in the periodic table in 1925?
4
What did Henry Gwyn-Jeffreys Moseley demonstrate about the atomic number?
The atomic number determines the properties of an element.
What was the highest atomic number of known elements in the 1930s?
92
What is the definition of a transuranic element?
An element with an atomic number greater than 92.
How important was the formation of elements in our solar system?
It was important for the formation of all the planets and other celestial bodies.
Where do the atoms and molecules that make up your body come from?
They were created during the Big Bang.
Study Notes
- Henry Gwyn-Jeffreys Moseley, an English physicist, established the relationship between the atomic number (number of protons) and the properties of an element.
- In 1919, Ernest Rutherford achieved a nuclear transmutation reaction, transforming one element into another, showcasing the process.
- The Periodic Table is arranged based on atomic number, electron configuration, and chemical properties of the elements.
- Synthetic elements are radioactive, with transuranic elements having atomic numbers greater than 92 and superheavy elements beyond 103.
- Supernovae play a crucial role in the formation of elements in our solar system, highlighting their significance.
- Elements in the human body, including protons, electrons, and neutrons, originated from the Big Bang, raising questions about their birthdates.
- Atoms are the smallest units of matter forming chemical elements, with electrons carrying a negative charge and protons a positive charge.
- The atomic number, representing the number of protons, serves as the identity of an atom, while the atomic mass is the sum of protons and neutrons.
- Isotopes are atoms with the same atomic number but different atomic masses, with some elements being synthesized using particle accelerators in 1925.
Test your knowledge on the definitions of terms related to atoms and subatomic particles, including electron, protons, neutrons, elements, and the periodic table of elements.
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