1. What are the two classifications of substances?
A. Element and Mixture
B. Compound and Mixture
C. Element and Compound
D. Compound and Pure substance

2. What substances are made up of atom or atoms of the same kind ?
A. Compounds
B. Elements
C. Mixtures
D. Pure substances

3. The following are elements EXCEPT one. What is it? A. Gold
B. Hydrogen
C. Iron
D.Water

4. What are the two elements that compose a molecule of water?
A. Carbon and Hydrogen
B. Hydrogen and Oxygen
C. Hydrogen and Calcium
D. Chlorine and Oxygen

5. Which does NOT belong to the group?
A. Acid
B. Metal
C. Metalloid
D. Non-inetal

6. There are 118 known elements today and arranged in a systematic way in what is called the_________.
A. Periodic System of Elements
B. Periodic Table of Compounds
C. Periodic Table of Elements
D. General Periodic System

7. Compounds may be classified into_________.
A. acids, bases, and salts
B. acids, metals, and salts
C. homogeneous and heterogeneous
D. metals, nonmetals, and metalloids

8. The following substances are found in a food product label. Which is NOT a compound?
A. Calcium B. Ferrous sulfate C. Salt D. Sugar

9. Salt or Sodium chloride (NaCl) is a compound. What are the elements that compose this compound?
A. Hydrogen and Oxygen
B. Sodium and Chloride
C. Sodium and Calcium
D. Sodium and Chlorine

10. Which of the following are examples of compounds?
A. Iron, Phosphorus, Salt, Water, Rust
B. Hydrogen, Oxygen, Salt, Water, Chalk
C. Iron, Oxygen, Hydrogen, Calcium, Gold
D. Salt, Water, Chalk, Rust, Sugar, Carbon dioxide.

Pa answer
NONSENSE=REPORT‼️​