LILJI A. Choose the letter of the best answer 1. Which of the following statements is TRUE for both elements and compounds? A. They are pure substances.
B. They are the simplest form of matter
C. They are present in indefinite proportions. D. They are broken down into simpler substances by physical means
.2. Which of the following substances is an element?
A. Air
C. Sugar
B. Fluorine
D. Water
3. Which of the following is TRUE about compounds?
A. They are made of the same kind of atom.
B. They can be separated by physical means.
C. They are always present in indefinite ratios.
D. They have a unique set of properties different from their constituent elements, 4. Sodium chloride, commonly known as table salt is a compound. Which of the following statements is INCORRECT?
A. The chemical symbol of the compound is Naci.
B. The compound is made of two elements sodium and chlorine.
C. The compound can be broken down into elements by chemical means.
D. The two elements in the compound belong to the same group in the periodic table.
5. It is the most abundant metal in the human body, found mainly in bones and teeth.
A calcium
C. magnesium
B. jodine
D. phosphorus
Pa answer po