Answer:
The scientist is studying oxygen which can also be found in protien. oxygen is the element which makes up to 65% of human body mass. It is also found in proteins inside the body.
Answer:
C. metals
Explanation:
Elements in the periodic table are grouped into metal and non-metals depending on their characteristics. Metals usually possess the following characteristics:
- High melting and boiling point
- Brittle i.e. ability to break
- lustre i.e. ability to shine when polished.
- Good conductor of heat and electricity
Based on this above characteristics, element Q in this question is a METAL because it posseses the same qualities that a metal does.
Question 2
D) Carbohydrates
Calcite occurs in igneous, metamorphic, and sedimentary rocks and is the most commonly encountered carbonate mineral.
