What is one way to describe elements? a. they are the smallest particles of any material. b. they are the building blocks of matter. c. they are the most expensive materials on earth. d. they break down easily.

Solution:

it is the smallest particles of any material. It means Elements are chemically the simplest substances and hence cannot be broken down using chemical reactions. Elements can only be changed into other elements using nuclear methods.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

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