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Atomic Structure and the Periodic Table Flashcards | StudBud
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Atomic Structure and the Periodic Table
Atomic Structure and the Periodic Table
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Review for our upcoming test over Chapters 4 & 5.
Flashcards
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Questions
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Answers
1
Which element in the figure is the most reactive metal?
Be
Na
C
N
2
Find the block labeled "?" in the figure. What is its atomic number?
12
2
7
3
3
The glowing of a neon light is caused by electrons emitting energy as they
collide with the nucleus
move from lower to higher energy levels
move from higher to lower energy levels
collide with other electrons
4
Atoms of the most reactive elements tend to have
no valence electrons
four or five valence electrons
one or seven valence electrons
eight valence electrons
5
To find the number of neutrons in an atom, you would take the
atomic number minus mass number
isotope number minus atomic number
mass number minus atomic number
atomic number minus electron number
6
Which element in the figure is a noble gas?
I
Na
N
He
7
Isotopes of an element are different from the element itself because
isotopes have a different number of electrons
isotopes have a different atomic number
isotopes have a different number of protons
isotopes have a different number of neutrons
8
Which of these features DECREASES as you move from LEFT to RIGHT across the periodic table?
ionization energy
atomic number
electronegativity
atomic radii (radius)
9
Moving left to right across the periodic table, which of the following increases by one?
isotope number
atomic number
atomic mass unit
mass number
10
Which element in the figure is a transitional metal?
C
V
Na
Be
11
What is the name of the family that contains the most reactive non-metals?
Alkali Metals
Noble Gases
Halogens
Alkaline Earth Metals
12
Which of the elements shown in the figure will the "?" most resemble?
Na
He
I
Be
13
A member of the boron family has three valence electrons; a member of the nitrogen family has
three
four
five
none
14
As you go across the period from LEFT to RIGHT, the ionization energy
increases
decreases, then increases
increases, then decreases
decreases
15
Which subatomic particle has a negative charge?
neutron
electron
proton
alpha particle
16
What is the difference between an atom in the ground state and an atom in an excited state?
The atom in ground state has less energy and is less stable
The atom in the excited state has one fewer electron
The atom in excited state has more energy and is less stable
The atom in excited state has one more electron
17
In the Bohr model of the atom, electrons move
like beach balls on water waves
like planets orbiting the sun
like popcorn in a popcorn popper
like balls rolling down a hill
18
Which statement is true about oxygen-17 and oxygen-18?
Their atoms have identical mass.
They do not have the same number of protons.
They are isotopes of oxygen.
They have the same mass number.
19
Among the alkali metals, the tendency to react with other substances
varies in an unpredictable way within the group
does not vary among the members of the group
decreases from top to bottom within the group
increases from top to bottom within the group
20
A tiny piece of matter that cannot be divided is a(n)
electron
atom
element
molecule
21
What does the electron cloud model describe?
The precise locations of electrons in atoms
The mass of the electrons in an atom
The most likely locations of electrons in atoms
The number of electrons in an atom
22
Which statement about subatomic particles is NOT true?
Unlike protons and electrons, neutrons have no charge.
Protons and electrons have opposite charges.
Protons and neutrons have the same charge.
Protons and neutrons have almost the same mass.
23
The number of protons in one atom of an element is that element's
isotope
mass number
atomic number
balanced charge
24
Which of the elements shown in the figure are in the same period?
Na, V, and I
Be, V, and F
Be, C, N, and F
He, F, and Be
25
What is the name of the family that contains the most reactive metals?
Noble Gases
Alkali Metals
Alkaline Earth Metals
Halogens
26
The atomic mass of an element is
the sum of protons and neutrons in one atom of the element
a weighted average of the masses of an element's isotopes
twice the number of protons in one atom of the element
a ratio based on the mass of a carbon-12 atom
27
Which elements in the figure have the same number of valence electrons?
Be, C, N, and F
F and I
He, Be, and V
Be and Na
28
In an atomic model that includes a nucleus, positive charge is
concentrated in the center of an atom
spread evenly throughout an atom
concentrated at multiple sites in an atom
located in the space outside the nucleus
29
How many valence electrons does the block with a "?" have?
2
7
12
3
30
Which element in the figure is a metal?
C
N
F
Be
31
Which of the following is unique for any given element?
the number of neutrons
the mass of a neutron
the number of protons
the charge on the electrons
32
What can you assume has happened if an electron moves to a higher energy level?
The electron has gained energy
The atom has become more stable
The atom has lost an electron
The electron has lost energy
33
Which element in the figure is the most reactive non-metal?
Be
Na
C
F
34
Elements have no electric charge even though they are made up of charged particles because
they have equal numbers of protons, neutrons, and electrons
they have equal numbers of protons and neutrons
they have equal numbers of protons and electrons
they have equal numbers of neutrons and electrons
35
As you move left to right across a period, the number of valence electrons
increases and then decreases
increases
decreases
stays the same
36
Which statement is true about the metalloid silicon?
Silicon is a better conductor of electricity than sulfur
Silicon does not conduct electricity under any conditions
Silicon's ability to conduct electricity does not vary
Silicon is a better conductor of electricity than silver
