Question

the periodic table is an arrangement of the chemical elements, ordered by atomic number, into families, and by doing so, illustrates the periodic properties of the elements. scan the periodic table from left to right. which is not a trend among the properties of elements? a solid to - gas b reactive to non - reactive c metal to metalloid to non - metal d increasing number of outer - shell electrons

Explanation:

Step1: Analyze option A

The state of elements (solid - gas) is not a general trend across the periodic table from left - right for all elements. For example, there are metals (solids) on the left, but not a simple solid - gas trend for all.

Step2: Analyze option B

Elements on the left (e.g., alkali metals) are reactive, and noble gases (on the right) are non - reactive. So, reactive - nonreactive is a trend.

Step3: Analyze option C

From left (metals) to middle (metalloids) to right (non - metals) is a well - known trend.

Step4: Analyze option D

As we move from left to right across a period, the number of outer - shell electrons increases (e.g., in period 2: Li has 1 outer electron, Be has 2, …, Ne has 8).

Answer:

A. solid to gas