Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements: (1) A compound must always contain two or more types of atoms.
(2) The description "one substance present, two phases present, all molecules are homoatomic" is consistent with a sample that is an element.
(3) The number of known elements is less than one hundred.
A) All three statements are true.
B) Two of the three statements are true.
C) Only one of the statements is true.
D) None of the statements is true.

Question

Quizplus · Accepted Answer

(1) FALSE - A compound can also contain only one type of atom, such as diatomic molecules like O2, N2, etc. 
(2) TRUE - This description is consistent with a sample that is an element because an element is composed of only one type of atom and can exist in two phases (solid and gas, for example) under certain conditions. 
(3) TRUE - The number of known elements is less than one hundred, currently numbering around 92 naturally occurring elements on the periodic table. Therefore, two out of the three statements are true, making choice B the best answer.

Use the Following to Answer the Questions Below