WorksheetsQAM #2 Review
Total questions: 21
Worksheet time: 42mins
The elements on the periodic table are arranged in order of increasing
mass number
atomic number
number of valence electrons
number of isotopes
In which set do the elements have the most similar chemical properties?
N, O, F
Hg, Br, Rn
Li, Na, K
Al, Si, P
Which sequence of elements is arranged in order of decreasing atomic radius?
Al, Si, P
Li, Na, K
Cl, Br, I
N, C, B
Which statement describes the general trends in electronegativity and ionization energy as the elements in period 3 are considered in order from Na to Cl?
Electronegativity increases, and ionization energy decreases
Electronegativity and ionization energy both decrease
Electronegativity decreases, and ionization energy increases
Electronegativity and ionization energy both increase
Which substance contains bonds that involves the transfer of electrons from one atom to another?
NO
NO2
CaO
CO2
Which reaction represents fusion?
Which reaction represents fission?
Compared to the half-life and decay mode of the nuclide Sr-90, the nuclide Ra-226 has
a longer half-life and the same decay mode
a longer half-life and a different decay mode
a shorter half-life and the same decay mode
a shorter half-life and a different decay mode
If 80 mg of a radioactive element decays to 10 mg in 30 minutes, what is the half-life of the element?
10 min
20 min
30 min
40 min
Which risk is related to the radioactive isotopes used to generate electricity?
depletion of fossil fuels
depletion of atmospheric ozone
exposure to acid rain
exposure to nuclear emissions
In which type of reaction can an atom of one element be converted to an atom of another element?
addition
reduction
substitution
transmutation
94Be + 11H → _____ + 42He
What can be concluded if an ion of an element is smaller than an atom of the same element?
The ion is negatively charged because it has fewer electrons than the atom
The ion is negatively charged because it has more electrons than the atom
The ion is positively charged because it has fewer electrons than the atom
The ion is positively charged because it has more electrons than the atom
Which of the following is the correct electron-dot diagram for an atom with an electron configuration of 2-8-18-5?
Which element has six valence electrons in each of its atoms in the ground state?
Se
As
Kr
Ga
Compared to the properties of the metals in Period 2, the properties of the nonmetals in Period 2 have
lower ionization energy and lower electronegativity
lower ionization energy and higher electronegativity
higher ionization energy and lower electronegativity
higher ionization energy and higher electronegativity
When metals form a bond with nonmetals, they tend to
gain electrons and become negative ions
gain electrons and become positive ions
lose electrons and become positive ions
lose electrons and become negative ions
Which type of molecule is CH4?
polar, with a symmetrical distribution of charge
polar, with an asymmetrical distribution of charge
nonpolar, with a symmetrical distribution of charge
nonpolar, with an asymmetrical distribution of charge
A solid substance is an excellent conductor of electricity. The chemical bonds in this substance are most likely
Ionic, because the valence electrons are mobile
Ionic, because the valence electrons are stationary
Metallic, because the valence electrons are mobile
Metallic, because the valence electrons are stationary
Which elements are both classified as metalloids?
Ge and As
Sb and Po
B and N
Si and P
Which statement correctly describes two forms of oxygen, O2 and O3?
They have identical molecular structures and the same properties
They have different molecular structures and the same properties
They have identical molecular structures and different properties
They have different molecular structures and different properties
