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All About Atoms
Test Description: Use the information from class to answer the following questions.
Instructions: Answer all questions to get your test result.
1) Where are protons found in an atom?
A
In the nucleus
B
around the nucleus
C
outer energy levels
D
in the electron cloud
2) How many electrons are on the second energy level?
A
32
B
8
C
2
D
16
3) What is the charge of an neutron?
A
negatively charged
B
positvely charged
C
none of the above
D
neutrally charged
4) Which of the following causes an object to have a negative charge?
A
Electrons are added
B
Neutrons are removed
C
protons are added
D
Electrons are removed
5) Which of the following accurately compares the masses of neutrons and protons?
A
mass of 1 neutron = mass of 1 proton
B
mass of 1 electron = mass of 1 proton
C
mass of 1 neutron = mass of 1 electron
D
mass of 2000 neutrons = mass of 1 proton
6) What did Rutherford conclude from his gold foil experiment?
A
An atom's negative charge is in its nucleus
B
An atom's positive charge is in its nucleus
C
Thomson's model of the atom was correct
D
An atom's positive charge is spread evenly throughout the atom
7) How many energy levels is/are needed for a lithium atom's three electrons when the atom is in its ground state?
A
one
B
zero
C
two
D
three
8) Which of the following is true about carbon - 12?
A
An atomic mass unit is defined as one - twelfth the mass of a carbon -12 atom
B
It has 8 protons and 8 neutrons
C
It is used as a standard for comparing the atomic numbers of atoms.
D
Scientists assigned a mass of 6 atomic mass units to the carbon- 12 atom
9) In a neutral atom, the number of protons is equal to the number of electrons. What is overall charge if the atom loses an electron?
A
static
B
negative
C
neutral
D
positive
10) Which model of the atom can be compared with the orbit of the planets around the sun?
A
electron - cloud model
B
Rutherford's model
C
Bohr's model
D
Thompson's model
*select an answer for all questions
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