What is Arthritis ? pls help​

Inflammation of one or more joints, causing pain and stiffness that can worsen with age.

Different types of arthritis exist, each with different causes including wear and tear, infections, and underlying diseases.

Symptoms include pain, swelling, reduced range of motion, and stiffness.

Medications, physical therapy, or sometimes surgery helps reduce symptoms and improve quality of life.

Explanation:

a disease causing painful inflammation and stiffness of the joints.

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.