What are some simple elements used in everyday life and what are their names?

Some simple elements used in everyday life include oxygen (O), which is essential for breathing; carbon (C), found in organic compounds and fuels; hydrogen (H), used in water and various chemical reactions; and nitrogen (N), a key component of fertilizers. Other common elements are sodium (Na), present in table salt, and calcium (Ca), important for bone health. These elements play crucial roles in biological processes and various household products.