Question

elements are arranged in the periodic table based on various patterns. for example, the element magnesium (mg)
○a. has a higher atomic mass than the element calcium (ca)
○b. has a higher atomic mass than the element sodium (na)
○c. has a lower atomic mass than the element beryllium (be)
○d. all of these

Explanation:

Step1: Identify atomic masses

Atomic mass of Mg is approximately 24.31, Ca is about 40.08, Na is around 22.99, and Be is about 9.01.

Step2: Compare atomic masses

• Mg (24.31) < Ca (40.08), so A is incorrect.
• Mg (24.31) > Na (22.99), so B is correct.
• Mg (24.31) > Be (9.01), so C is incorrect.

Answer:

B. has a higher atomic mass than the element sodium (Na)