.What does the nucleus of an atomcontain

The nucleus is a collection of particles called protons, which are positively charged, and neutrons, which are electrically neutral. Protons and neutrons are in turn made up of particles called quarks. The chemical element of an atom is determined by the number of protons, or the atomic number, Z, of the nucleus.

Explanation: big brain

a chair, a bed, and a toothbrush

explanation:

i was told this before by a teacher, so yeah

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?