question 4\nwhich of the following is an element?\nsucrose\nsodium chloride\nhydrogen gas\nquestion 5\nwhich…

question 4\nwhich of the following is an element?\nsucrose\nsodium chloride\nhydrogen gas\nquestion 5\nwhich of the following is not one of the four most common elements?\nsodium\noxygen\nnitrogen\nhydrogen\ncarbon

question 4\nwhich of the following is an element?\nsucrose\nsodium chloride\nhydrogen gas\nquestion 5\nwhich of the following is not one of the four most common elements?\nsodium\noxygen\nnitrogen\nhydrogen\ncarbon

Answer

Brief Explanations:

  • For Question 4: An element is a pure substance made of only one type of atom. Sucrose is a compound ($C_{12}H_{22}O_{11}$), sodium - chloride is a compound ($NaCl$), and hydrogen gas ($H_2$) is made of only hydrogen atoms, so it is an element.
  • For Question 5: The four most common elements in living things are carbon, hydrogen, oxygen, and nitrogen. Sodium is not one of them.

Answer:

Question 4: C. hydrogen gas Question 5: A. Sodium