interactive periodic table (1-2 sentences each)

Question

part 1: elements around you
1) what elements account for about 20 percent of a human's total body mass?
2) which of the most abundant elements in earths crust are nonmetals?
3) what do the most abundant elements in earths atmosphere have in common?

Answer 1

1. The elements that account for about 20 percent of a human's total body mass are primarily oxygen and carbon, with oxygen making up around 65% and carbon about 18% of body mass, along with smaller amounts of hydrogen and nitrogen.

2. The most abundant nonmetals in Earth's crust include oxygen and silicon; oxygen is the most prevalent element, primarily found in silicate minerals, while silicon is the second most abundant element, forming the backbone of many rock types.

3. The most abundant elements in Earth's atmosphere—nitrogen (about 78%) and oxygen (about 21%)—are both gaseous at room temperature and play crucial roles in supporting life; they are essential for respiration and combustion processes.

Answer 2

1) what element account for about 20 percent of a human's total body mass?
(1 sentence)

Answer 3

Carbon accounts for about 20 percent of a human's total body mass, alongside other key elements such as oxygen, hydrogen, and nitrogen.

Answer 4

2) which of the most abundant elements in earths crust are nonmetals?
(1 sentence)

Answer 5

The most abundant nonmetals in Earth's crust are oxygen and silicon, with oxygen being the most plentiful element overall.