Question 7 1 pts
Which particles are found in the nucleus of an atom?
O protons and electrons
electrons and neutrons
o protons and neutrons
O protons, neutrons, and electrons
Question 8
1 pts

Protons and Neutrons

Explanation:

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.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

69 is the correct math for the amino acids