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Chemistry - Atomic Structure & Radiation Flashcards | StudBud
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Chemistry - Atomic Structure & Radiation
Chemistry - Atomic Structure & Radiation
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Basic atomic radiation; isotopes; atomic structure; periodic table
Flashcards
25 cards
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Practice quiz
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Questions
25
Answers
1
What is formed when a chemical reaction takes place?
reactant
mixture
product
phase
2
Which radioactive emission can penetrate all components of a human body, causing cell damage?
gamma
alpha
beta
neutron radiation
3
In Uranium-238, what does the 238 represent?
the atomic number
twice the number of protons
the number of electrons
the mass number
4
A subatomic particle with no charge.
electron
nucleus
neutron
proton
5
When two or more components are put together by
physical
means:
substance
mixture
compound
reactant
6
When a chemical reaction takes place...
some matter is destroyed
matter is not created or destroyed
some matter is created & some is destroyed
new matter is created
7
The atomic mass is equal to the total quantity of which particle(s)?
protons + neutrons
electrons
protons
neutrons
8
Which statement is
NOT
true about atoms?
An atom has a positively charged nucleus.
Atoms of the same element have the same masses.
Atoms of the same element have the same atomic numbers.
Atoms are mostly empty space.
9
The type of nuclear radiation that has no mass but is a negatively charged particle is
beta particles
gamma rays
neutron radiation
alpha particles
10
The atomic number is the total number of which particle(s)?
electrons
protons + neutrons
neutrons
protons
11
U-238 decays to become U-234. What type of radioactive particle was emitted?
alpha
gamma
neutron
beta
12
Which is
NOT
a physical property?
density
boiling point
mass
flammability
13
Which particle from radioactive decay can penetrate skin, but is stopped by a sheet of Al foil?
beta
neutron radiation
alpha
gamma rays
14
How many neutrons are in Iodine-128?
53
128
127
75
15
Which ionizing particle is the largest in mass/size?
beta
gamma
neutron radiation
alpha
16
Substance that exists at the
beginning
of a chemical reaction:
mixture
reactant
phase
product
17
Who
first
came up with the idea of an atom?
Dalton
Atomos
Mrs. Poli
Democritus
18
A substance made of multiple components that are chemically combined in a specific ratio.
element
nucleus
mixture
compound
19
Which is true of Dalton's atomic Theory?
All of the above
All atoms of a given element are identical.
Compounds are 2 or more kinds of atoms in fixed ratios.
All matter is made of small particles, atoms
20
Which is the correct formula for the element sodium?
all of the above
NA
Na
na
21
Which is
NOT
a homogeneous mixture?
oil & vinegar
salt water
air
steel
22
Hg- 202 undergoes radioactive decay to produce Tl-202. What type of particle was emitted?
neutral
gamma
alpha
beta
23
What occurs when an isotope has an unstable nucleus?
its mass decreases by beta particles
it decays, emitting particles and energy
it attracts electrons to stabilize its outer shell
its mass increases by alpha particles
24
What is the average atomic mass of the following isotopes: 19.9% B-10 and 80.1% B-11
11.000
8.801
1080.1
10.801
25
Which is a physical change?
rusting
red litmus paper turning blue
log burning
evaporation
