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WorksheetsAtomic Structure - Chemistry Lecture
Total questions: 28
Worksheet time: 14mins
Name
Class
Date
1.
All matter is composed of atoms
a)
True
b)
False
2.
460 BC - He developed the idea of atoms
a)
Democritus
b)
John Dalton
c)
Joseph John Thompson
d)
Ernest Rutherford
e)
Niels Bohr
3.
He pounded up materials in his pestle and mortar until he had reduced them to smaller and smaller particles
a)
Democritus
b)
John Dalton
c)
Joseph John Thompson
d)
Ernest Rutherford
e)
Niels Bohr
4.
It is Greek for Indivisible
a)
Atoma
b)
Atoms
c)
Electron
d)
Proton
5.
1808 - He suggested that all matter was made up of tiny spheres that were able to bounce around with perfect elasticity
a)
Democritus
b)
John Dalton
c)
Joseph John Thompson
d)
Ernest Rutherford
e)
Niels Bohr
6.
He coined the term "Atoms"
a)
Democritus
b)
John Dalton
c)
Joseph John Thompson
d)
Ernest Rutherford
e)
Niels Bohr
7.
These are the basic points of the Dalton theory, EXCEPT:
a)
All substances are made up of tiny, indivisible particles called atoms
b)
Atoms of the same element are identical in shape, size, nass, and other properties
c)
Each element is composed of its own kind of atoms. Atoms of different elements are different in all respects
d)
Atoms are visible particles
8.
These are the basic points of the Dalton theory, EXCEPT:
a)
Atom is the smallest unit that takes part in chemical combinations
b)
Atoms combine with each other in simple whole number ratios to form compound atoms called molecules
c)
Atoms cannot be created, divided, or destroyed during any chemical or physical change
d)
Atoms can be destroyed
9.
1898 - He discovered the negative particle which he called an ELECTRON
a)
Democritus
b)
John Dalton
c)
Joseph John Thompson
d)
Ernest Rutherford
e)
Niels Bohr
10.
He believed that the atom is a uniform sphere of positive charge with electrons (raisins) embedded in it.
a)
Democritus
b)
John Dalton
c)
Joseph John Thompson
d)
Ernest Rutherford
e)
Niels Bohr
11.
1904 - He developed the idea that an atom was made up of electrons scattered unevenly within an elastic sphere surrounded by a soup of positive charge to balance the electron's charge like plums surrounded by pudding (PLUM PUDDING MODEL)
a)
Democritus
b)
John Dalton
c)
Joseph John Thompson
d)
Ernest Rutherford
e)
Niels Bohr
12.
1910 - He fired Helium nuclei at a piece of GOLD FOIL which was only a few atoms thick. They found that although most of them passed through about 1 in 10,000 hit
a)
Democritus
b)
John Dalton
c)
Joseph John Thompson
d)
Ernest Rutherford
e)
Niels Bohr
13.
Rutherford's new evidence allowed him to propose a more detailed model with a __________
a)
Central Nucleus
b)
Central Electron
c)
Quarks
14.
Rutherford suggested that the _____ charge was all in a central nucleus. With this holding the electrons in place by electrical attraction.
a)
Positive
b)
Negative
c)
Neutral
15.
These are the two major drawbacks to the Rutherford Models, EXCEPT:
a)
According to the electromagnetic theory, an accelerating charged particle must emit radiation, and lose energy. Because of this loss of energy, the electron would slow down, would follow a spiral path, and ultimately fall into nucleus. If it happens then the atoms should collapse.
b)
It does not say anything about the arrangement of electrons in an atom.
c)
It says that there is a central nucleus in the atom.
16.
How many electrons are there in the 1st shell
a)
2
b)
8
c)
16
17.
How many electrons are there in the 2nd shell
a)
2
b)
8
c)
16
18.
How many electrons are there in the 3rd shell
a)
2
b)
8
c)
16
19.
He refined Rutherford's idea by adding that the electrons were in orbits.
a)
Democritus
b)
John Dalton
c)
Joseph John Thompson
d)
Ernest Rutherford
e)
Niels Bohr
20.
Dalton proposes the indivisible unit of an element is the atom
a)
1803
b)
1904
c)
1911
d)
1913
e)
1926
21.
Thomson discovers electrons, believed to reside within a sphere of uniform positive charge (the "plum pudding model")
a)
1803
b)
1904
c)
1911
d)
1913
e)
1926
22.
Rutherford demonstrates the existence of a positively charged nucleus that contins nearly all the mass of an atom
a)
1803
b)
1904
c)
1911
d)
1913
e)
1926
23.
Bohr proposes fixed circular orbits around the nucleus for electrons.
a)
1803
b)
1904
c)
1911
d)
1913
e)
1926
24.
In the current model of the atom, electrons occupy regions of space (orbitals) around the nucleus determined by their energies.
a)
1803
b)
1904
c)
1911
d)
1913
e)
1926
25.
It is the number of protons and neutrons in an atom
a)
Atomic Mass
b)
Atomic Number
26.
Number of Electrons = Number of Protons = Atomic Number
a)
True
b)
False
27.
Isotopes are the atoms of the same element having same Atomic Mass but different Atomic Number
a)
True
b)
False
28.
Isotopes of any particular element contain the same number of protons, but different number of neutrons
a)
True
b)
False
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