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GEN Chem. Ch.4 Test Review - Atomic Structure Flashcards | StudBud
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GEN Chem. Ch.4 Test Review - Atomic Structure
GEN Chem. Ch.4 Test Review - Atomic Structure
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Your BEST bet to studying for Chapter 4 Test
Flashcards
36 cards
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Questions
36
Answers
1
What determines the number of protons in an atom?
Mass number
Atomic Mass
Atomic Number
Number of neutrons
2
Who discovered the Neutron?
Bohr
Rutherford
Democritus
Chadwick
3
Neutrons have about the same mass as what subatomic particle?
Atom
Nucleus
Electron
Protons
4
How big is an Atomic Mass Unit (AMU)?
Half the mass of hydrogen
One-twelfth the mass of carbon-12
One-fifteenth the mass of nitrogen-15
One-fourth the mass of lithium
5
Instrument used to identify substances in a sample of blood or urine (drug test)
gold foil
chemiluminescence
spectrograph
centrifuge
6
Who theorized all matter is made of atom? (name Mr.G cannot say properly)
Thompson
Mrs. Mau
Chadwick
Democritus
7
The particle of an atom with a positive charge.
Nucleus
Positron
Electron
Proton
8
Who discovered protons in the nucleus of an atom?
Rutherford
Thomson
Bohr
Chadwick
9
What is the atomic symbol for Argon?
Hg
Ag
Ar
AR
10
The nucleus of an atom has...
A positive charge AND high mass
A positive charge and HIGH MASS
A POSITIVE CHARGE and high mass
A positive charge and high mass
11
Negatively charged particle of an atom
Nucleus
Neutron
Electron
Protons
12
Which particle is more likely involved in chemical reactions in a lab setting?
Nucleus
Electron
Neutron
Proton
13
Atoms with the same number of protons and electrons, but different number of neutrons
Duplicates
Isotopes
Atomic Twins
Samitopes
14
The man who thought atoms were just tiny solid spheres.
Rutherford
Avagadro
Shamus
Dalton
15
What is the subatomic particle with no charge?
Electron
Proton
Nucleus
Neutron
16
What is the mass of an electron?
Not 1 AMU!
1/1840 AMU
A lot smaller than a proton
17
How do you calculate atomic mass?
Atomic # + Protons
Electrons + Neutrons
Protons + Neutrons
18
What is the weighted average mass of isotopes of an atom?
Atomic Number
Atomic Mass
Number of Neutrons
Number of Protons
19
Why was Dalton's theory accepted and not Democritus'?
Dalton actually tested his hypotheses
Dalton actually saw the atom
Democritus was a philosopher so he didn't test anything
Democritus agreed with him
20
Democritus said we could not _________ an atom. Since his time, we've proved him wrong.
Divide
See
Create
Dissolve
21
When chemical reactions result in the gain or release
photons
when they lose energy.
Endothermic
Spectography
Chemiluminescence
Exothermic
22
Elements are isotopes if they have the same # of protons but different...
Atomic Number
Nucleus
Mass
Atomic Mass
23
An atom of an element with atomic # 15 and mass # of 31 contains...
15 protons, 15 electrons, 30 neutrons
15 protons, 15 electrons, 0 neutrons
15 protons, 15 electrons, 15 neutrons
15 protons, 15 electrons, 16 neutrons
24
Which subatomic particles must be equal for a stable atom?
Protons & Electrons
Nucleus & Electrons
Electrons & Neutrons
25
The sum of protons and neutrons in an atom is equal to...
Electrons
Nucleus Number
Mass number
Atomic number
26
Carbon-14 has how many neutrons?
12.011
8
9
10
27
What did Rutherford use to discover the nucleus?
spectrograph
chemiluminescence
Mrs. Mau
gold foil
28
Isotopes of an element differ in what way?
Mass number
# of electrons
# of neutrons
# of protons
29
Where is most of the mass of an atom located?
Nucleus
Electrons
Neutrons
Protons
30
Who discovered the electron?
Democritus
Rutherford
Thompson
Chadwick
31
What is the dense, positively charged
center
to an atom?
Nucleus
Electron
Neutron
Proton
32
Which element has 0 neutrons?
Carbon
Lithium
Helium
Hydrogen
33
If you add or subtract a proton form an element it forms a(n)...
compound
new element
molecule
ion
34
What does the number in Nitrogen-14 stand for?
Atomic Mass
Neutrons
Protons
Electrons
35
How do the isotopes Carbon-6 and Carbon-7 differ?
C-7 has more protons
C-7 has one more neutron
C-7 has one more electron
C-6 has one more electron
36
The smallest particle of matter is...
A proton
A neutron
An atom
An electron
