WorksheetsChemistry – 4.2 – The Structure of the Nuclear Atom (1)
Total questions: 15
Worksheet time: 10mins
Name
Class
Date
1.
The first person to ever talk about an atom was
a)
Democritus
b)
Rutherford
c)
Dalton
d)
Bohr
2.
Who stated that all atoms of the same element are excacty alike?
a)
Democritus
b)
Dalton
c)
Thomson
d)
Borh
3.
What scientist is best known for his "Plum Pudding" model of the atom?
a)
J.J. Tomson
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
4.
J.J. Thomson provided evidence that an atom...
a)
is the smallest particle of matter
b)
contains negatively charged particles
c)
has an overall negative charge
d)
has an overall positive charge
5.
A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass
a)
Electron Shells
b)
Orbitals
c)
Electron Cloud
d)
Nucleus
6.
Who is credited with the Atomic Theory?
a)
Dalton
b)
Thomson
c)
Bohr
d)
Democritus
7.
Rutherford determined that the positive particles of an atom are located where?
a)
In the nucleus
b)
Outside the nucleus
8.
Who discovered the positively charged subatomic particles?
a)
Dalton
b)
Goldstein
c)
J.J. Thomson
d)
Chadwick
9.
Who discovered the neutrally charged subatomic particles?
a)
Dalton
b)
Goldstein
c)
J.J. Thomson
d)
Chadwick
10.
The mass of a proton?
a)
1.67 x 10-27 kg
b)
9.11 x 10-31 kg
c)
1.11 x 10-28 kg
11.
The mass of a neutron?
a)
1.67 x 10-27 kg
b)
9.11 x 10-31 kg
c)
1.11 x 10-28 kg
12.
The mass of an electron?
a)
1.67 x 10-27 kg
b)
9.11 x 10-31 kg
c)
1.11 x 10-28 kg
13.
Although all parts of Dalton's atomic theory are important, which one of the postulates is crucial to explain the observations summarized by the Law of Definite Proportions?
a)
Atoms are very small.
b)
Atoms of the same elements have the same properties
c)
Matter is composed of atoms
d)
Atoms chemically combine with other atoms in fixed, whole-number ratios
14.
Which of the following is NOT a part of Dalton's atomic theory?
a)
All elements are composed of atoms.
b)
Atoms are alwyas in motion.
c)
Atoms of the same element are always identical.
d)
Atoms that combine do so in simple, whole-number ratios.
15.
What type of particles exist within an atomic nucleus?
a)
Protons and Neutrons
b)
Neutrons and electrons
c)
Neutrons and Atoms
d)
Elements and Atoms
100 %
