HESI A19
HESI A2 Chemistry Practice Test
1. How are elements arranged in the periodic table?
- A. Order of increasing atomic number
- B. Alphabetical order
- C. Order of increasing metallic properties
- D. Order of increasing neutron content
Correct answer: A
Rationale: In the periodic table, the elements are arranged in order of increasing atomic number. This organization is based on the number of protons in the nucleus of each element. It provides a systematic way to classify elements and predict their properties. Knowing the atomic number of an element helps determine its placement in the periodic table and its characteristics. Therefore, the correct answer is the order of increasing atomic number as it is fundamental to the structure and properties of the elements. Choices B, C, and D are incorrect. Alphabetical order does not reflect any underlying property of the elements, metallic properties vary across the table, and neutron content alone is not the basis for the arrangement in the periodic table.