10 Questions
What is an atom?
An atom is a particle that consists of a nucleus of protons and generally neutrons, surrounded by an electromagnetically-bound swarm of electrons.
How are chemical elements distinguished from each other?
Chemical elements are distinguished from each other by the number of protons that are in their atoms.
What is the only atom that has no neutron?
The only atom that has no neutron is protium 1H.
What are isotopes of the same element?
Isotopes of the same element are atoms with the same number of protons but a different number of neutrons.
Why can't humans see atoms with conventional microscopes?
Humans cannot see atoms with conventional microscopes because atoms are smaller than the shortest wavelength of visible light.
What is the approximate width of a human hair in terms of the number of carbon atoms across?
about a million carbon atoms wide
Why is it not possible to accurately predict the behavior of atoms using classical physics?
due to quantum effects
What percentage of an atom's mass is in the nucleus of protons and neutrons?
less than 0.06%
What are atoms with the same number of protons but a different number of neutrons called?
isotopes of the same element
What defines the chemical elements and distinguishes them from each other?
the number of protons in their atoms
Test your knowledge of chemistry with this quiz on atoms and elements! Explore the structure of atoms, the role of protons, neutrons, and electrons, and how the number of protons defines different chemical elements.
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