WorksheetsSemester Exam Review
Total questions: 62
Worksheet time: 33mins
The atomic particle that has a neutral charge is the
proton
electron
nucleus
neutron
An atom has 5 protons, 6 neutrons, and 4 electrons. How would you identify the element and isotope?
Atoms with 6 neutrons are Carbon, which all have a mass of 12.0108
Atoms with 5 protons are Boron, but this boron has 6 neutrons for a mass of 11
Atoms with 6 neutrons are Carbon, but the 5 protons give it a total mass of 11
Atoms with 6 neutrons are Carbon, but the particles add up to a total mass of 15
Atoms with 5 protons are Boron, which all weigh 10.81
Which of the following particles are located in the nucleus of the atom?
Proton and Electron
Electron and Neutron
Proton, Neutron, and Electron
Proton and Neutron
A student defines the Mass Number as “The larger number listed by an element on the periodic table by each element, it usually has decimals.” This is not quite accurate. Which best explains why his description is wrong?
The Mass Number is not always the same between isotopes of the same atom, so is not found on the periodic table.
The mass number is equal to the atomic number.
The mass number is equal to the average atomic mass.
The Mass Number can also be smaller than the atomic number.
A teacher has made the claim that a Mass Number sometimes be smaller than the atomic number. Which best explains why this is not possible?
I can’t see any elements on the periodic table where that’s true.
Neither number considers the mass of electrons.
The mass number is the number of protons and neutrons combined, but the atomic number is the protons alone.
The atomic number only gives us information about the number of protons, and so has nothing to do with mass.
Which explains the strange decimal numbers on the periodic table?
Some neutrons and protons weigh more than others.
Atoms can change mass back and forth.
Some different isotopes of the same element may exist in nature, so the average mass of the element is given.
We aren’t really sure how much the atoms really weigh.
Why are mass numbers not on the periodic table?
Not all atoms with the same number of protons will weigh the same, because the number of neutrons can be different.The mass of individual atoms cannot be known.
They are on the table, and hydrogens really weigh 1.007 each
Different authors cannot agree on what the mass values are exactly, so they are simply not listed.
An ion has 15 protons, 14 Neutrons, and 18 electrons. Which element is this?
Oxygen
Silicon
Argon
Phosphorous
An isotope of Bromine has a mass of 81. Which shows the correct nuclear notation of the symbol?
3579Br
8179Br
3581Br
7981Br
Which is the correct hyphenated name of the isotope that has 20 protons and 21 neutrons?
Calcium - 20
Calcium - 41
Calcium - 21
Scandium - 20
How many valence electrons does a neutral silicon atom have? What detail on the periodic table tells you?
14, atomic number
28.0855, average atomic mass
4, group (column)
3, period (row)
Which is the correct Lewis Dot Structure for a neutral silicon atom?
Neon has 10 electrons and Argon has 18 electrons. Why are they in the same group of the periodic table?
They have the same number of electrons in their valence shell.
They are both gases.
They react with each other.
They have the same mass.
Fluorine is the most reactive element in the periodic table, and can take an electron from most any other element. Neon is totally unreactive. Why are these two placed together on the table?
They are only one proton different from each other.
Opposites attract.
They have very similar weights.
They are both gases.
Which of the following is true about Isotopes of an element?
I) they are the same element
II) they have the same number of neutrons
III) their average mass is shown as a decimal on the periodic table
I and II
I and III
Which of the following is correct regarding Electronegativity?
I. it is how much an atom wants to “get rid of” its electrons
II. it increases from left to right on the periodic table
III. it is the ability of an atom to attract or “steal” electrons
I and II
II and III
What type of decay is it?
Alpha decay
Gamma decay
Beta decay
Zombie decay
How does the atomic number change in the reaction?
It goes up by one
It does not change
It goes down by one
It is always 1 AMU
How do you know that mass is conserved in this reaction?
The total mass number goes up by one in the products
You subtract one from the total mass
The total mass number is the same in the reactants and the products
The total mass is zero in both reactants and products
Why does Iodine turn into Xenon?
Because of the electrons
Because of the protons
Because of the neutrons
Because of the charge
Which element is represented in this electron configuration?
Carbon
Nitrogen
Magnesium
Silicon
In order to satisfy the octet rule, nitrogen will
Lose 3 electrons
Gain 3 electrons
Gain 5 electrons
Lose 5 electrons
An element with its valence shell nearly full and an element with only very few valence electrons would have which type of bond?
Covalent Bond
Ionic Bond
Metallic Bond
Brotherly Bonds
Which describes metallic bonds best?
Metal atoms sharing electrons in an aggressive tug-of-war because both are very attractive.
Metal ions attracted to each other by opposite charges because one has an extra electron and one has a missing electron.
Metal atoms sharing electrons out of loving kindness toward all neighboring atoms.
Metal atoms sharing electrons loosely because none of them attract electrons very strongly, so electrons are able to wander between them.
Which describes ionic bonds best?
Metals and nonmetals sharing electrons in an aggressive tug-of-war because both are very attractive.
Atoms sharing electrons out of loving kindness toward all neighboring atoms.
Metal and nonmetal ions attracted to each other by opposite charges because one has missing electrons and the other has extra electrons.
Metal and nonmetal atoms sharing electrons loosely because neither attract electrons strongly, so electrons are able to wander between them.
Which describes Covalent bonds best?
Nonmetal atoms sharing electrons loosely because none of them attract electrons strongly, so electrons are able to wander between them.
Nonmetal atoms sharing electrons in an aggressive tug-of-war because both are very attractive.
Nonmetal ions attracted to each other by opposite charges because one has an extra electron and one has a missing electron.
Nonmetal atoms sharing electrons out of loving kindness toward all neighboring atoms.
Which shows the correct Lewis Dot Structure of NH3 ?
What would the formula for the resulting compound be for Calcium and Oxide ions?
CaO
CaO2
Ca2O
Ca2O2
What would the formula for the resulting compound be for Magnesium and Chloride ions?
Mg2Cl
Mg2Cl2
MgCl
MgCl2
What would the formula for the resulting compound be for Calcium and Nitride ions?
Ca2N3
Ca5N2
Ca3N2
CaN
Why does silicon gain 4 electrons?
To have an even number of electrons.
To get to the other side.
To undergo nuclear decay.
To have a full octet.
Which best describes how ionic bonds are formed?
Metals and non-metals are always attracted to each other because they both have protons.
Particle trade charges with each other, so they have the opposite of what they used to have.
No one really knows.
A particle with a positive charge and a particle with a negative charge are attracted to each other because of their opposite charges.
Name the covalent compound: Si2O3
Silicon, oxygen
Disilicon trioxide
Silicon oxide
Disilicon trioxygen
Name the covalent compound: NF5
Nitrogen Pentafluoride
Nitrogen Fluorine
Pentanitrogen Fluoride
Nitrogen (V) Fluoride
What are molecular compounds made of?
two non-metals
a metal and a transition metal
a metal and a non-metal
an acid and a non-metal
an H ion and another ion
What are ionic compounds made of?
a metal and a transition metal
two non-metals
an acid and a non-metal
an H ion and another ion
a metal and a non-metal
What does the Roman numeral in Gold (III) cyanide represent?
Three gold atoms
Three cyanide ions
Cyanide with a +3 charge
Gold with a -3 charge
Gold with a +3 charge
What is the geometry of the molecule shown?
Bent
Trigonal planar
Trigonal pyramidal
Tetrahedral
Linear
What is the geometry of the molecule shown?
Bent
Trigonal planar
Trigonal pyramidal
Tetrahedral
Linear
What is the geometry of the molecule shown?
Bent
Trigonal planar
Trigonal pyramidal
Tetrahedral
Linear
As the wavelength of light increases,
The frequency increases
The speed of light increases
The energy increases
The intensity increases
none of these
What is the geometry of a BF3 molecule?
Bent
Trigonal planar
Trigonal pyramidal
Tetrahedral
Linear
In BF3, which describes the bonds between the boron atom and the fluorine atoms?
Ionic
Polar covalent
Metallic
Non-polar covalent
Which best describes the polarity of BF3?
polar molecule
Bipolar
non-polar molecule
South-polar
Which shows the Lewis dot structure of CF4?
List the symbols for sodium, sulfur, and cesium in order of increasing atomic radii
Na, S, Cs
S, Na, Cs
Cs, Na, S
Cs, S, Na
Which describes the bonds between atoms in CF4?
Ionic
Metallic
Non-polar covalent
Polar covalent
Which describes the polarity of the molecule CF4?
polar molecule
non-polar molecule
popular
polar bear
Which of the following is true for any neutral atom?
Atomic number = number of protons = number of electrons
Mass number = number of protons = number of electrons
Atomic number = number of protons = number of neutrons
Mass number = number of protons = number of neutrons
What is the volume of 60.0 grams of ether if the density of ether is 0.70 g/mL?
86 mL
1.2 x 10-2 mL
2.4 x 10-2 mL
42 mL
The name of the compound Na3PO4 is
Sodium phosphide
Sodium phosphite
Sodium phosphate
Trisodium phosphorateium
Which group of periodic table elements only form +1 ions?
Noble gases
Alkali metals
Halogens
Metalloids
When electrons are gained by an atom, the particle formed is called a(n)
cation
anion
isotope
Isomer
How many grams are in 0.78 moles of MgSO4?
93.9 g
154.4 g
6.02 x 1023 g
none of these
The molar mass of HC2H3O2 is
48 g
60 g
90 g
92 g
What is the symbol for the most electronegative element on the periodic table?
Fr
F
Rn
He
H
What is the symbol for an alpha particle?
What is the symbol for an beta particle?
What is the symbol for an gamma particle?
Which scientist discovered the nucleus?
Isaac Newton
Ernest Rutherford
ALbert Einstein
Neils Bohr
Which scientist is first credited with the atomic theory?
Ernest Hemingway
Neils Bohr
John Dalton
Charles Darwin
Which scientist discovered the electron?
Alexander Bell
Thomas Edison
J J Thompson
Madam Curie
