Which best describes the trends in electronegativity on the periodic table?

Electronegativity increases up and to the right.

same number of protons but different number of neutrons

the measurement of the ability to attract electron into a compound.

Group One elements ...

Have one electron in their outer shells

Define: Electronegativity

The tendency of an atom to attract electrons.

According to the aufbau principle,

electrons enter orbitals of lowest energy first

In a chemical equation a REACTANT is......

A substance that undergoes a change in a chemical equation

The ratio of elements in the compound potash (K2CO3) is

2 potassium : 1 carbon : 3 oxygen

Rutherford's experiment also proved this about the nucleus...

It has great mass compared to the rest of the atom.

According to the Law of Definite Proportions, any two samples of a compound will have

same proportion of elements by mass

studbud

Chemistry mid-term Exam Review

99 termsStudBud Administration21 plays

Imported from external platform

Flashcards99 cardsFPractice quizPHost liveL

Questions 99

Answers

1
Which best describes the trends in electronegativity on the periodic table?
Electronegativity increases up and to the right.
Electronegativity increases down and to the left.
Electronegativity decreases up and to the left.
Electronegativity decreases down and to the right.
2
Are any of the three rules/principles Aufbau, Hund, or Pauli broken in the orbital diagram
Hund
Aufbau
Pauli
More than one
3
How many neutrons are present in this isotope?
0
13
6
7
4
Vertical families share similar chemical properties.
False
True
5
Energy is _______ in chemical bonds.
Helped
Stored
Relied
Stoped
6
In terms of trends in the periodic table, atomic radius:
Decreases across a period
Increases across a period
7
How many neutrons does Sodium have?
Na
12
11
22.98977
8
isotope
different number of electrons
same number of protons and neutrons
a charged particle
same number of protons but different number of neutrons
9
is carbon-11 a isotope?
True
False
10
He discovered electrons as negatively charged particles.
Bohr
Dalton
Mendeleev
JJ Thomsom
Rutherford
Democritus
11
What happens when an electron falls from an EXCITED state to a GROUND state?
releases heat or light
All of the above
releases energy
moves from an outer orbital to inner orbital
12
Energy must be ____ to move from its ground state to an excited state.
emitted
transferred
absorbed
released
13
According to periodic trends, is Fluorine or Chlorine more electronegative?
Fluorine
Chlorine
14
Electronegativity
Charge of an ion
the minimum energy required to remove an electron
Ability to an isotope
the measurement of the ability to attract electron into a compound.
15
Mendeleev's periodic table was (incorrectly) arranged by increasing
number of electrons
number of protons
atomic mass
atomic number
16
Ionic Bonds:
Split Electrons
Share Electrons
Give/Take Electrons
17
He created the first version of the modern periodic table.
Rutherford
Dalton
Bohr
JJ Thomsom
Mendeleev
Democritus
18
Is this a Lewis Dot or Bohr Diagram?
Bohr Diagram
Lewis Dot Diagram
19
In terms of trends in the periodic table, electronegativity:
Increases across a period
Decreases across a period
20
Which group is the halogens?
5
2
6
7
21
What is the correct volume in the graduated cylinder?
45.8 mL
45.0 mL
46 mL
45 mL
22
He introduced the first widely accepted atomic theory.
Mendeleev
Democritus
Rutherford
JJ Thomsom
Dalton
Bohr
23
The first Periodic Table was created by:
Amadeo Avogadro
Ernest Rutherford
Henry Mosely
Dmitri Mendeleev
24
Covalent Bonds are bonds between:
Non-metal and nobel gas
Non-Metal and Non-Metal
Metal and Metal
Metal and Non-Metal
25
Is this a Bohr Diagram or a Lewis Dot Diagram?
Lewis Dot Diagram
Bohr Diagram
26
Most of the volume of an atom is
electrons
neutrons
electron orbitals
protons
27
A ________ has more protons than electrons.
nobel gas
isotope
cation
anion
28
Atomic Theory is the theory of what?
the evolution of the atom
the evolution of science
29
He used math to create his model with a small, dense nucleus at the center and energy levels for electrons.
Mendeleev
JJ Thomsom
Bohr
Dalton
Democritus
Rutherford
30
Ionic Bonds are bonds between:
Metal and nobel gas
Metal and Metal
Metal and Non-Metal
Non-Metal and Non-Metal
31
Covalent Bonds:
Give/Take Electrons
Split Electrons
Share Electrons
32
Valence electrons are those that are:
always easily lost.
of the lowest energy.
held most loosely.
never easily lost.
33
Group One elements ...
Have different numbers of electrons in their outer shells
Have one electron in their outer shells
Have one electron missing from their outer shell
Have full outer shells of electrons
34
An expression that shows the elements in a compound and the ratio of atoms.
chemical formula
chemical symbol
chemical equation
algebraic expression
35
Define: Electronegativity
The tendency of an atom to attract electrons.
Compounds made up of non-metals.
Shows the structural arrangement of atoms in compounds.
The force by which one objects attracts another.
36
John Dalton created the first atomic theory
True
False
37
According to the aufbau principle,
electrons in the same orbital must have opposite spins
electrons enter orbitals of highest energy first
electrons enter orbitals of lowest energy first
an orbital may be occupied by only two electrons
38
JJ Thomson performed the gold foil experiment.
False
True
39
In a chemical equation a REACTANT is......
A substance that undergoes a change in a chemical equation
A substance that is the product of a chemical change
What gives energy for a chemical equation to occur
What absorbs the energy to create the product
40
The ratio of elements in the compound potash (K₂CO₃) is
2 potassium : 2 carbon : 2 oxygen
2 potassium : 1 carbon : 3 oxygen
3 potassium : 1 carbon : 2 oxygen
1 potassium : 2 carbon : 3 oxygen
41
Rutherford's experiment also proved this about the nucleus...
It has great mass compared to the rest of the atom.
It can be seen with a microscope.
It is gold in color.
It is made of protons and neutrons.
42
True or false: All compounds consist of a fixed ratio of elements.
true
false
43
Which configuration is possible in an excited state of electron?
10Ne:1s2 2s2 2p5 3s1
2He: 1s2
11Na:1s2 2s2 2p6 3d1
1H:1d1
44
What is the name of group 2?
Alkaline earth metals
Actinides series
Noble gases
Alkali metals
45
What element has the following ground state electron configuration? 1s²2s²2p⁵
Bromine
Chlorine
Neon
Fluorine
46
Select the HYPHEN notation of Lithium
3_Li^7
Li-3
7_Li^3
Li-7
47
The nuleus was discovered when alpha particles were shot through ___.
plasma
force fields
aluminum foil
gold foil
48
He discovered that the nucleus is positively charged and the atom is mostly empty space.
Mendeleev
JJ Thomsom
Democritus
Bohr
Dalton
Rutherford
49
According to the Law of Definite Proportions, any two samples of a compound will have
the same mass
different densities based on mass
similar chemical properties
same proportion of elements by mass
50
What information can we get from Bohr models ?
charge
the # of neutrons
the total # of electrons
mass number
51
Which families are most chemically reactive?
Alkali Metals and Halogens
Alkali Metals and Alkaline Metals
Noble Gases and Alkali Metals
Metaloids and Metals
52
What did Ernest Rutherford discover about atoms?
That atoms have positively charged particles floating about
That they are not mostly empty space
That they have a positively charged nucleus
That alpha particles cannot pass through atoms
53
ground state
heisenburg uncertainty priciple
the lowest energy level
the highest energy level
energy shells
54
Hunds Rule states that...
electrons like to be in the lowest energy possible.
one electron is placed in each orbital before pairing up
electrons like to have high energy.
electrons must pair up with opposite spins.
55
Name that Bohr Model!
Magnesium
Neon
Flourine
Sodium
56
Highest electronegativity
Ra
Fr
F
Ne
57
Electronegativity is:
The tendency of an atom to attract electrons
The tendency of an atom to extract neutrons
The tendency of an atom to attract protons
The tendency of an atom to extract electrons
58
Which is the correct Lewis Dot Structure?
D
G
F
E
59
single bonds share...?
1 electron
123456789 electrons
2 electrons
4 electrons
60
Neutrons add mass to an atom.
False
True
61
How did Mendeleev arranged the known chemical elements in a table?
number of neutrons
columns with similar properties
columns with metals
number of electrons
62
Who was Democritus?
The Roman philosopher responsible for the periodic table
Cool dude with a beard
The Greek philopsopher who came up with the idea of "atomos"
63
double bonds share...?
4 electrons
3 electrons
123456789 electrons
2 electrons
64
Lowest electronegativity
Ra
Fr
Ne
F
65
Groups are sometimes called families
True
False
66
All of the halogens are very ____
Reactive
Atomic
Special
Isotopic
67
Valence Electrons determine
charge of the element
Family group and reactivity of the atom
mass of the element
Period and reactivity of the element
68
Are any of the three rules/principles Aufbau, Hund, or Pauli broken in the orbital diagram
Pauli
None
Hund
Aufbau
69
He discovered that the nucleus is positively charged and the atom is mostly empty space.
Democritus
Dalton
JJ Thomsom
Mendeleev
Bohr
Rutherford
70
He stated (incorrectly) that all atoms of an elements have the same mass and properties.
Democritus
Rutherford
Dalton
JJ Thomsom
Bohr
Mendeleev
71
What are valence electrons?
Outermost energy level of atom; Involves chemical reactions.
The mid-section of an atom which makes us how we are now.
Outermost energy level of atom: Involves physical reactions
Innermost energy level of an atom; Involves Earth's gravity.
72
Periods in the periodic table are...
columns
rows
73
In terms of trends in the periodic table, Atomic radius:
Decreases down a group
Increases down a group
74
What is the correct volume in the graduated cylinder?
20.4 mL
24 mL
23.9 mL
25.1 mL
75
What do Lewis Dot structures represent?
number of electrons
number of protons
atomic mass
valence electrons
76
Which of the following is not a Nobel Gas
Helium
Oxygen
Krypton
Neon
77
Use dimensional analysis to calculate the number of days in 480 000 seconds.
6 days
5.55556 days
5 days
5.6 days
78
what is the Bohr diagram?
A diagram that shows all the electrons
An irrelevant diagram
A diagram that shows all the protons
A diagram that shows all the neutrons
79
halogens are non metals
False
True
80
In Nuclear Notation what does the TOP NUMBER AND the Letter C represent
Atomic Number
Atomic Number, Symbol
12,C
Atomic Mass, Symbol
81
Groups on the periodic table are arranged
Vertically
Horizontally
82
Are any of the three rules/principles Aufbau, Hund, or Pauli broken in the orbital diagram
None
Hund
Aufbau
Pauli
83
Which element in group 1 is most reactive?
Rb
K
Na
Li
84
What type of atom will get larger when they become ions?
nonmetals
metals
metaloids
nobel gases
85
Ionization energy ___ down a family due to ___ .
decreases; electrons are closer to nucleus
decreases; increased number of energy levels
increases; electrons are closer to nucleus
increases; increased number of energy levels
86
___________ are the part of the atom that form the chemical bonds.
electrons
protons
neutrons
ions
87
Group Seven elements have ...
varying numbers of electrons in their outer shell
seven electrons in their outer shell
full outer shells
one electron in their outer shell
88
Mendeleev organized his periodic table according to:
Atomic number
color
atomic mass
number of protons
89
JJ Thomson
discovered nucleus
Cathode Ray tube
found electrons
Plum Pudding Model
90
Nobel Gas (Shortcut) Configuration for Sr (#38)
[Xe]5s25p2
[Kr]5s25p2
[Xe]5s2
[Kr]5s2
91
The periodic table is arranged _______________.
alphabetically
by increasing atomic mass
by increasing atomic #
92
Another name for group 1 elements is...
Alkali metals
Halogens
Noble Gases
Alkali metals.
93
Metals are most likely to ___ electrons and form ___.
gain; cations
gain; anions
lose; anions
lose; cations
94
How do you find the number of Neutrons???
Atomic #
Mass # - Atomic #
Atomic # - Mass #
Mass #
95
Which of the Bohr models above accurately shows an atom of Lithium?
B
C
A
D
96
What is the ratio of elements in water?
2 Hydrogen Atoms : 1 Oxygen Atom
1 Hydrogen Atom : 2 Oxygen Atoms
5 Hydrogen Atoms : 4 Oxygen Atoms
3 Hydrogen Atoms : 1 Oxygen Atom
97
What element has the following ground state electron configuration?
Gallium
Aluminium
Phosphorus
Silicon
98
Only two electrons of opposite spin can occupy an orbital is a statement of
Amdemichael law
aufbau principle
Pauli exclusion principle
Hund's rule
99
He proposed the Plum Pudding model of the atom.
Democritus
Mendeleev
Bohr
JJ Thomsom
Dalton
Rutherford

Chemistry mid-term Exam Review Flashcards | StudBud