CHEM 104 Exam 1 | Questions and
Verified Answers | 100% Correct |
Verified
• metalloids -✓✓semi conductors are _______
A) metalloids. B) halogens C) transition elements.
D) metals. E) nonmetals.
• O3 -✓✓Which of the following is an element and a molecule?
A) Air B) He C) CO2 D) C E) O3
• fluorine -✓✓The ionization energy of chlorine is lower than the ionization energy of
________.
A) calcium B) sodium C) hydrogen D) fluorine E) lithium
• sugar -✓✓Choose the pure substance from the list below.
A) lemonade B) sea water C) air D) sugar E) coffee
• 305 mg -✓✓the recommended adult dos of elixophyllin, a drug used to treat asthma is
6.00 mg/kg of body mass. Calculate the dose in milligrams for a 112 lb person (1 kg=
2.20 lb)
A) 305 mg B) 672 mg C) 670 mg D) 300 mg E) 1478 mg
• protons -✓✓Z is the number of ________ in an atom.
A) protons and electrons B) protons
D) neutrons E) protons and neutrons
C) electrons
• 1.25x 10^3 kL -✓✓how many kL does a 1.25x10^8 cL sample contain?
• unreactive -✓✓Noble gases ________.
A) react vigorously with water
C) are unreactive
E) are good conductors of electricity
B) are liquids at room temperature
D) melt at high temperatures
• physical change -✓✓when sugar dissolves in water, this is an example of _________
A) change of shape B) change of element C) change of size
D) physical change E) chemical change
, • electron -✓✓the lightest of the subatomic particles is the ________ A) nucleus B) atom
C) neutron D) electron E) proton
• 4 -✓✓Silicon has ______ valence electrons
A) 4 B) 6 C) 10 D) 8 E) 2
• [Ne] 3s^2 3p^4 -✓✓abbreviated electron configuration for the sulfur atom
• Br -✓✓which element would have physical and chemical properties similar to chlorine?
A) Br B) Se C) O D) Ar E) P
• 76 -✓✓An atom of 130Xe contains neutrons.
A) 184 B) 130 C) 76 D) 54 E) 131
• C -✓✓Which of the following statements about isotopes is true?
A) Isotopes of the same element have the same mass.
B) Isotopes of the same element differ only in the number of electrons they contain.
C) Neon-22 is heavier than neon-21.
D) Isotopes of the same element have the same natural abundance.
E) All elements have 3 or more naturally occurring isotopes.
• Sn -✓✓Which of the following is a metal and in the p-block?
A) Sn B) Mg C) Sc D) F E) B
• Mg -✓✓What neutral element has the electron 1s^2 2s^2 2p^6 3s^2?
A) Si B) Be C) Ca D) Mg E) Na
• 3 -✓✓How many 4p orbital are in an atom?
A) 2 B) 4 C) 1 D) 6 E) 3
• all protons and neutrons -✓✓In an atom, the nucleus contains ________.
A) an equal number of protons and electrons
B) all the protons and electrons
C) all the protons and neutrons
D) only protons
E) only neutrons
• circle -✓✓3s-orbital
• cesium (Cs) -✓✓the atomic radius of potassium is smaller than the atomic radius of
_______ A) hydrogen B) cesium (Cs)
D) sodium E) lithium
C) fluorine
Verified Answers | 100% Correct |
Verified
• metalloids -✓✓semi conductors are _______
A) metalloids. B) halogens C) transition elements.
D) metals. E) nonmetals.
• O3 -✓✓Which of the following is an element and a molecule?
A) Air B) He C) CO2 D) C E) O3
• fluorine -✓✓The ionization energy of chlorine is lower than the ionization energy of
________.
A) calcium B) sodium C) hydrogen D) fluorine E) lithium
• sugar -✓✓Choose the pure substance from the list below.
A) lemonade B) sea water C) air D) sugar E) coffee
• 305 mg -✓✓the recommended adult dos of elixophyllin, a drug used to treat asthma is
6.00 mg/kg of body mass. Calculate the dose in milligrams for a 112 lb person (1 kg=
2.20 lb)
A) 305 mg B) 672 mg C) 670 mg D) 300 mg E) 1478 mg
• protons -✓✓Z is the number of ________ in an atom.
A) protons and electrons B) protons
D) neutrons E) protons and neutrons
C) electrons
• 1.25x 10^3 kL -✓✓how many kL does a 1.25x10^8 cL sample contain?
• unreactive -✓✓Noble gases ________.
A) react vigorously with water
C) are unreactive
E) are good conductors of electricity
B) are liquids at room temperature
D) melt at high temperatures
• physical change -✓✓when sugar dissolves in water, this is an example of _________
A) change of shape B) change of element C) change of size
D) physical change E) chemical change
, • electron -✓✓the lightest of the subatomic particles is the ________ A) nucleus B) atom
C) neutron D) electron E) proton
• 4 -✓✓Silicon has ______ valence electrons
A) 4 B) 6 C) 10 D) 8 E) 2
• [Ne] 3s^2 3p^4 -✓✓abbreviated electron configuration for the sulfur atom
• Br -✓✓which element would have physical and chemical properties similar to chlorine?
A) Br B) Se C) O D) Ar E) P
• 76 -✓✓An atom of 130Xe contains neutrons.
A) 184 B) 130 C) 76 D) 54 E) 131
• C -✓✓Which of the following statements about isotopes is true?
A) Isotopes of the same element have the same mass.
B) Isotopes of the same element differ only in the number of electrons they contain.
C) Neon-22 is heavier than neon-21.
D) Isotopes of the same element have the same natural abundance.
E) All elements have 3 or more naturally occurring isotopes.
• Sn -✓✓Which of the following is a metal and in the p-block?
A) Sn B) Mg C) Sc D) F E) B
• Mg -✓✓What neutral element has the electron 1s^2 2s^2 2p^6 3s^2?
A) Si B) Be C) Ca D) Mg E) Na
• 3 -✓✓How many 4p orbital are in an atom?
A) 2 B) 4 C) 1 D) 6 E) 3
• all protons and neutrons -✓✓In an atom, the nucleus contains ________.
A) an equal number of protons and electrons
B) all the protons and electrons
C) all the protons and neutrons
D) only protons
E) only neutrons
• circle -✓✓3s-orbital
• cesium (Cs) -✓✓the atomic radius of potassium is smaller than the atomic radius of
_______ A) hydrogen B) cesium (Cs)
D) sodium E) lithium
C) fluorine
