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PT #3
Test Description: Last Test Review
Instructions: Answer all questions to get your test result.
1) charge of a proton
A
neutral (no charge)
B
negative
C
positive
2) charge of an electron
A
positive
B
negative
C
neutral (no charge)
3) location of an electron
A
in the nucleus
B
outside the nucleus
4) Most of our atmosphere is _______________ gas
A
oxygen
B
carbon dioxide
C
helium
D
nitrogen
5) If an atom is neutral, what 2 particles have equal numbers?
A
neutron and electron
B
none of these
C
proton and electron
D
neutron and proton
6) atomic number always equals the number of these
A
photons
B
protons
C
neutrons
D
neutrinos
7) symbol for iron
A
In
B
Ir
C
Fe
D
I
8) change that produces new substances
A
physical
B
chemical
9) example of a physical change
A
iron rusting
B
ice melting
C
paper burning
10) how the periodic table is arranged
A
by date of discovery of the elements
B
by atomic number
C
alphabetically
D
by mass number
11) charge and location of a neutron
A
negative; in the nucleus
B
negative; outside the nucleus
C
neutral; in the nucleus
D
neutral; outside the nucleus
*select an answer for all questions
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