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Atoms And Molecules
Test Description: Atoms Molecules and the periodic table
Instructions: Answer all questions to get your test result.
1) Because atoms are so small?
A
There is no way to describe them.
B
Scientists create models to describe them.
C
They can not be synthesized by scientists.
D
They cannot be made of smaller particles.
2) Whichis the smallest particle of matter?
A
compound
B
Atom
C
Molecule
D
Solid
3) What happens if new evidence is discovered about atoms that current theories about atoms do not explain?
A
Nothing, current theories about atoms are scientists’ best idea, so those theories remain valid.
B
Nothing, current theories about atoms are hypothesis and do not need to be supported by new evidence
C
Current theories about atoms will be abandoned for a new theory.
D
Current theories about atoms will be modified in light of new evidence.
4) Which is to small to view using a microscope?
A
A leukocyte
B
An atom
C
A cell
D
A single human hair
5) Describe the Thomson model of the atom.
A
Distinct orbits of electrons.
B
A round ball, of different sizes depending on the element.
C
has a distinct nucleus, empty space and protons.
D
Plum pudding model
6) Which particle is not part of an atom?
A
Neutron
B
Electron
C
Negitron
D
Proton
7) In a neutral atom, the number of protons equals the number of?
A
Nuclei
B
Positrons
C
Electrons
D
Neutrons
8) Describe the Bohr model fo the atom.
A
A round ball, different sizes depending on the element.
B
Has a distinct nucleus, empty space and protons.
C
Distinct orbits of its electrons.
D
Plum pudding model.
9) What information on the periodic table indicates the number of protons in an element?
A
The elements atomic number.
B
The elements atomic mass.
C
The element's chemical symbol.
D
The position of the element in its column.
10) What describes the isotope of carbon?
A
Carbon does not have any Isotopes and is not radioactive.
B
Isotopes have a greater number of protons.
C
Has sixteen protons, neutrons and electrons.
D
Has six protons but different number of neutrons.
*select an answer for all questions
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