Question 1

The chemical behavior of an element is determined by the _____.

Accepted Answer

A)   number of neutrons
B)   number of electrons
C)   number of isotopes
D)   atomic number
E)   atomic massF) C) and E)
G) B) and C)

Question 2

The elements of the group 7A will all form ions. These ions will be _____ and will have a charge of _____.

Accepted Answer

A)   cations; 2+
B)   anions; 2 −
C)   cations; 3+
D)   anions; 1 −
E)   cations; 1+F) A) and E)
G) A) and B)

Question 3

The number of protons in a neutral atom is equal to the _____ of the atom.

Accepted Answer

A)   mass
B)   atomic weight
C)   atomic number
D)   mass number
E)   valence electron numberF) A) and B)
G) B) and E)

Question 4

How many protons (p) , neutrons (n) , and electrons (e)  are in an atom of 235U?

Accepted Answer

A)   92 p, 146 n, 92 e
B)   92 p, 143 n, 92 e
C)   92 p, 92 n, 146 e
D)   92 p, 92 n, 92 e
E)   92 p, 51 n, 92 eF) B) and D)
G) A) and C)

Question 5

Which of these is a nonmetal?

Accepted Answer

A)   Mg
B)   Br
C)   Cu
D)   Ge
E)   LiF) B) and C)
G) B) and E)

Question 6

Mendeleev organized the elements of the periodic table in order of increasing _____.

Accepted Answer

A)   atomic number
B)   atomic mass
C)   number of electrons
D)   number of isotopes
E)   number of neutronsF) C) and D)
G) A) and C)

Question 7

Which of these statements best describes the formation of an anion?

Accepted Answer

A)   An atom loses one or more electrons and becomes positively charged.
B)   An atom loses one or more electrons and becomes negatively charged.
C)   An atom gains one or more electrons and becomes positively charged.
D)   An atom gains one or more electrons and becomes negatively charged.
E)   An atom gains one or more electrons and becomes electrically neutral.F) B) and E)
G) B) and D)

Question 8

Copper has two naturally occurring isotopes. Cu-63 has a mass of 62.939 amu and Cu-65 has a mass of 64.928 amu. Based on the atomic mass of copper, which isotope has a higher fractional abundance?

Accepted Answer

A)   Cu-63
B)   Cu-65
C)   Cu-63 and Cu-65 have equal fractional abundances.
D)   Insufficient data
E)   Fractional abundance is independent of isotopes.F) A) and B)
G) A) and C)

Exam 3: Atoms and Elements

The number of protons in a neutral atom is equal to the _____ of the atom.

Correct Answer
verified

Mendeleev organized the elements of the periodic table in order of increasing _____.

Correct Answer
verified

The chemical behavior of an element is determined by the _____.

Correct Answer
verified

Which of these is a nonmetal?

Correct Answer
verified

Copper has two naturally occurring isotopes. Cu-63 has a mass of 62.939 amu and Cu-65 has a mass of 64.928 amu. Based on the atomic mass of copper, which isotope has a higher fractional abundance?

Correct Answer
verified

Which of these statements best describes the formation of an anion?

Correct Answer
verified

The elements of the group 7A will all form ions. These ions will be _ and will have a charge of _.

Correct Answer
verified

How many protons (p) , neutrons (n) , and electrons (e) are in an atom of ²³⁵U?

Correct Answer
verified

Exam 3: Atoms and Elements

The number of protons in a neutral atom is equal to the _____ of the atom.

Correct AnswerverifiedShow Answer

Mendeleev organized the elements of the periodic table in order of increasing _____.

Correct AnswerverifiedShow Answer

The chemical behavior of an element is determined by the _____.

Correct AnswerverifiedShow Answer

Which of these is a nonmetal?

Correct AnswerverifiedShow Answer

Copper has two naturally occurring isotopes. Cu-63 has a mass of 62.939 amu and Cu-65 has a mass of 64.928 amu. Based on the atomic mass of copper, which isotope has a higher fractional abundance?

Correct AnswerverifiedShow Answer

Which of these statements best describes the formation of an anion?

Correct AnswerverifiedShow Answer

The elements of the group 7A will all form ions. These ions will be _____ and will have a charge of _____.

Correct AnswerverifiedShow Answer

How many protons (p) , neutrons (n) , and electrons (e) are in an atom of 235U?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The elements of the group 7A will all form ions. These ions will be _ and will have a charge of _.

Correct Answer
verified

How many protons (p) , neutrons (n) , and electrons (e) are in an atom of ²³⁵U?

Correct Answer
verified