1-2-1 Discovering Parts of an Atom
Quiz by Lori Stroud
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Measures 1 skill fromGrade 8Science (2016)Indiana Academic Standards
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What is an atom mostly made of?29
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What is an atom mostly made of?
Why have scientists only recently been able to see atoms?
atoms are too small to see with ordinary microscopes
scientists didn't know atoms existed
early experiments disproved the idea of atoms
scientists were not looking for atoms60s8.PS.1
The earliest model of an atom contained only protons and electrons.
Which best describes an atom?
the smallest particle that still represents an element
the smallest particle that still represents a compound
a particle with a single negative charge
a particle with a single positive charge60s8.PS.1
What is Structure X?
Which best describes Structure X?
very small part of the atom's mass; negative charge
most of the atom's mass; neutral charge
very small part of the atom's mass; positive charge
most of the atom's mass; positive charge60s8.PS.1
Air fills most of an atom.
Which is true about the size of an atom?
it can only be seen using a scanning tunneling microscope
it is too small to see with any type of microscope
it is about the size of the period at the end of this sentence
it is large enough to be seen using a magnifying lens60s8.PS.1
Whose model for the atom is shown?
In the present-day model of the atom, the nucleus of the atom is at the center of an electron cloud.
What structure did Rutherford discover?
an area around an atomic nucleus where an electron is most likely to be found
a neutral particle that exists in the nucleus of an atom
an area where most of an atom's mass and positive charge is concentrated; in the center of an atom
an atomic particle that has one positive charge (1+) found in the nucleus
a particle with one negative charge (1-) found around the nucleus
smallest piece of an element that still represents that element
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