1) List the four elements that comprise 96% of body weight

2) Describe the three components of an atom 

Answer:

1.

The four (4) elements below comprises 96.3% of human body weight:

• Oxygen (O) - 65.0%
• Carbon (C) - 18.5%
• Hydrogen (H) - 9.5%
• Nitrogen (N) - 3.3%

2.

Protons and neutrons make up the nucleus of an atom, while electrons circulate around it. Electrical charges exist between protons and electrons. Each proton has a positive charge of one unit, whereas each electron has a negative charge of one unit. A neutron is an electrically neutral particle, as its name indicates.