Question
Which statement explains why isotopes of the same element have the same chemical properties?
A. They have the same electronic structure.
B. They have the same relative mass.
C. They have the same nucleon number.
D. They have the same proton number.
Answer/Explanation
Ans:
A
Question
Which statement about the atoms of all the isotopes of carbon is correct?
A They are all radioactive.
B They have the same mass.
C They have the same number of neutrons.
D They have the same number of electrons in the outer shell.
Answer/Explanation
Ans: D
Question
Which statement about carbon is correct?
A Diamond and graphite both have simple molecular structures.
B Diamond and graphite are both used to make cutting tools.
C Each carbon atom in diamond is bonded to three other carbon atoms.
D Graphite conducts electricity and has a giant covalent structure.
Answer/Explanation
Ans: D
Question
Which statement about an atom of fluorine, \(_{9}^{19}\textrm{F}\), is correct?
A. It contains more protons than neutrons.
B. It contains a total of 28 protons, neutrons and electrons.
C. Its isotopes contain different numbers of protons.
D. Its nucleus contains 9 neutrons.
Answer/Explanation
Ans:
B