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Atoms: there structure + electrons Flashcards | StudBud
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Atoms: there structure + electrons
Atoms: there structure + electrons
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a #chemistry review quiz on #isotopes, #waves, #orbitals
Flashcards
18 cards
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Questions
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Answers
1
this type of radiation emits particles of 2 protons and 2 neutrons represented as 4/2 He
gamma
beta
epsilon
alpha
2
How did Sir William Crookes discover the electron?
he used a spectroscope to see them
he observed a flash of light in a cathode ray
he observed a continuous spectrum in a cathode ray
he used a spectroscope to see a flash of light
3
what element has the following electron configuration (Xe)
6s
2 ?
barium
strontium
francium
argon
4
What type of spectrum is shown in the image to the right?
emission spectrum
electromagnetic spectrum
absorption spectrum
continuous spectrum
5
How do unstable atoms gain stability?
by losing energy (emitting radiation)
by gaining protons
by gaining energy
6
In order of increasing energy, the sequence of energy sublevels in a principle energy level is
s, p, d, f
d, s, p, f
f, d, p, s
s, p, f, d
7
This is the minimum amount of energy that can be gained or lost by an atom
atomic mass unit
orbital
quantum
photon
8
Use the diagram to determine which color of the visible spectrum has the highest frequency
violet
yellow
red
green
9
For the isotope Potassium-39, potassium has a mass number of ___ and ___ neutrons.
39, 21
39, 19
39, 20
19, 20
10
What is the name of the ionic compound MgCl
2
?
dimagnesium chloride
magnesium dichloride
magnesium chlorine
magnesium chloride
11
How many valence electrons does sulfur have?
5
8
4
6
12
HUP states that it is impossible to know precisely the __ and __ of a particle at the same time
velocity and energy
frequency and position
energy and position
velocity and position
13
Which statement(s) from John Dalton's atomic theory was/were later proven incorrect?
all atoms of a given element have identical properites
atoms are the smallest units of matter
atoms cannot be created nor destroyed
different atoms combine in simple whole number ratios
14
smallest component of an element that has all the characteristic properties of that element is
an electron
an atom
matter
an ion
15
Isotopes are elements with the same number of _____, but a different number of _____
neutrons, electrons
protons, neutrons
electrons, protons
neutrons, protons
16
Aristotle criticized Democritus' ideas on atoms because he couldn't explain...
where electrons are located
what holds the atoms together
how big atoms are
why different elements have different properties
17
phenomenon in which a metal emits electrons when light of a sufficient frequency shines on it
radiation
photon
continuous spectrum
photoelectric effect
18
The number of ____ in an atom is referred to as the element's atomic number.
average of the atomic mass
protons
protons and electrons
protons and neutrons