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CK-12 4.1 Atoms Questions and Answers
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Exam of 2 pages for the course Atom at Atom (CK-12 4.1 Atoms)
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CK-12 4.1 Atomsscanning tunneling microscope - answer The only microscope that can make images of
things as small as atom.
What are Atoms? - answer Atoms are building block of matter. They are the smallest
particles of an element that still have element's properties.
Elements - answer Pure Substances- such as nickel, hydrogen, and helium- that make
up all kinds of matter.
Size of Atoms - answer Atoms are extremely small. The radius of an atom is under 1
nanometer, which is one-billionth of a meter.
Which element I has the biggest atom? (From what we have learned) - answer Cesium
(CS)
Three main types of particle that make up all atoms are - answer Protons, electrons,
and neutrons
What is proton? - answer Subatomic Particles which has a positive electric charge.
What is electrons? - answer Which have a negative electric change.
What is neutrons? - answer Which are neutral in electric charge.
What is nucleus? - answer The dense area at the center is called the nucleus. Where all
the protons and neutrons are clustered closely together.
What does electrons do? - answer They constantly move around the nucleus.
All Atoms of carbon have six protons. How many electrons do carbon atoms have? -
answer Six electrons
What is all matter made of? - answer Atoms
The radius of an atom is closest in size to a ___________. - answer Nanometer
A neutral atom has equal numbers of _____ and electrons. - answer Protons
What is contained in the nucleus of an atom? - answer protons and neutrons
What do all atoms of the same electrons have in common - answer Number of protons
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