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Chapter 3 Test
Test Description: Atoms, Ions, Isotopes, History of the atom and basic mole conversions
Instructions: Answer all questions to get your test result.
1) What is an isotope
A
Atom with different number of Protons
B
A single atom
C
Atom with different number of electrons
D
Atom with different number of neutrons
2) Carbon 14 has how many neutrons?
A
9
B
8
C
7
D
6
3) What is the mass number for a Chlorine atom that has 20 neutrons?
A
37
B
17
C
35
D
34
4) What is an ion?
A
Atom with different number of electrons
B
Atom with different number of protons
C
Atom with different number of neutrons
D
Atom with different number of both protons and electrons
5) A negative ion is called a(n)
A
anion
B
cation
6) A nitrogen atom has a -3 charge, how many electrons does it have?
A
7
B
10
C
4
D
9
7) A magnesium atom has 10 electrons. What is its charge?
A
+2
B
+1
C
-1
D
-2
8) What does the -p- orbital most look like?
A
a donut
B
a sphere
C
two tear drops
D
a star
9) What is the law of conservation of mass?
A
Mass can be destroyed
B
Mass cannot be created nor destroyed?
C
Mass can be created
10) Who discovered the proton?
A
Millikan
B
Thomson
C
Rutherford
D
Dalton
11) Who discovered the mass and charge of an electron?
A
Millikan
B
Thomson
C
Dalton
D
Rutherford
12) Who discovered the electron
A
Rutherford
B
Dalton
C
Thomson
D
Millikan
13) Who was the schoolmaster with a 5 part atomic theory?
A
Rutherford
B
Thomson
C
Millikan
D
Dalton
14) How many grams are in 0.456 mol of Cu
A
.056 g Cu
B
.0301 g Cu
C
42.0 g Cu
D
29.0 g Cu
15) How many moles are in 10.23 grams of Carbon?
A
.164 mole
B
12.0 mole
C
.852 mole
D
14.24 mole
16) How many atoms are in one mole of anything?
A
1 atom
B
6.022 x 10^23 atoms
C
5.62 x 10^23 atoms
D
Depends on the elements weight
17) How many moles are in 4.56 x10^24 atoms of gold?
A
5.77
B
7.57 x 10^48
C
7.57
D
79
18) How many atoms are in 32.9 grams of Kr
A
2.36x10^23
B
97.5
C
83.8
D
8.38x10^23
19) What element has a molar mass of 190.23
A
Os
B
Ag
C
Au
D
Nb
*select an answer for all questions
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