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