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C2: Atoms, Elements, Ions, Isotopes, Nucleus and Atomic Theory Flashcards | StudBud
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C2: Atoms, Elements, Ions, Isotopes, Nucleus and Atomic Theory
C2: Atoms, Elements, Ions, Isotopes, Nucleus and Atomic Theory
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#atoms #elements #periodicTable
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Answers
1
What does amu stand for?
chemistry math
a special type of cow
atomic mass unit
atlantic mechanical university
2
What are isotopes?
same number of protons but different atomic mass
different number of protons but same atomic mass
different number of protons but same number of neutrons
same number of protons and same number of neutrons
3
What makes up the atomic mass?
Protons-Neutrons
Protons+Neutrons
Electrons+Neutrons
Protons+Electrons
4
Which letter is the symbol for the proton (atomic) number?
M
A
N
Z
5
Calculate the average mass of boron, which occurs 20% boron-10 and 80% boron 11.
2.5 amu
10.8 amu
21.1 amu
10.0 amu
6
What is inside the nucleus of an atom?
Protons and Ions
Protons and Neutrons
Protons and Electrons
Neutrons and Electrons
7
Calculate average atomic mass of rubidium. 72% Rubidium-85, 28% Rubidium-87
24.4 amu
90.0 amu
85.5 amu
61.2 amu
8
When an atom receives an electron, the overall charge...
stays neutral
becomes positive
becomes negative
becomes lightning
9
Which letter is the symbol for the mass number?
Z
M
A
N
10
The ____ of an element is an average of protons and neutrons in its isotopes
atomic number
number of neutrons
relative atomic mass
number of protons
11
What does the atomic number tell you?
number of elements
number of protons
number of charges
number of ions
12
How many electrons? Atomic Mass: 41, number of protons: 19.
19
38
41
22
13
Which force holds protons and neutrons in the nucleus?
Electromagnetic Force
Magnetic Force
Nuclear Fusion
Nuclear Force
14
No two different elements will have the same ______.
number of isotopes
atomic number
atomic mass
number of ions
15
How many neutrons does Carbon-14 have?
6
8
14
12
