Question

Which of the following statements is FALSE regarding elements and the periodic table?

(A) Most of the halogens exist as diatomic molecules in their standard state
(B) The alkaline earth metals are a family located in group 2 on the periodic table
(C) Sodium and krypton are both alkali metals
(D) Radon exists as a monatomic gas in its standard state
(E) Arsenic is in the same period as iron

Answer 1

Option (C) Sodium and krypton are both alkali metals

Step-by-step explanation:

The FALSE statement regarding elements and the periodic table is option (C) Sodium and krypton are both alkali metals. Sodium is an alkali metal located in group 1 on the periodic table, while krypton is a noble gas located in group 18. Alkali metals are found in group 1, while noble gases are found in group 18.

Answer 2

The false statement regarding elements and the periodic table is (C) Sodium and krypton are both alkali metals, because while sodium is an alkali metal, krypton is a noble gas. (option c)

Step-by-step explanation:

The false statement regarding elements and the periodic table is (C) Sodium and krypton are both alkali metals. This statement is not accurate because sodium is indeed an alkali metal, but krypton is not. Krypton is classified as a noble gas and is located in Group 18 of the periodic table, while the alkali metals are located in Group 1.

Most halogens do exist as diatomic molecules in their standard state, as per statement (A). The alkaline earth metals, named in statement (B), are correctly placed in Group 2. According to statement (D), radon does indeed exist as a monatomic gas in its natural state. As for statement (E), arsenic and iron are both located in period 4, making this statement true.

Hence, the answer is option c