3Which of the following is NOT made up two or more type of atom
A. Table sugar
B. A crystal of table salt
C. Vinegar
D. Alumnium foil
8 A crystal of table salt
A compound is a substance that
A is made up of only element
B. Is made up of two or more elements chemically joined together.
C. Contains only metallic elements chemically joined together
D. Contains two or more elements pysically combined in a fixed ratio.
5. Which of the following substances is an element?
A SO
C. HB
B. Co
D. CO
6. Which of the following is used in making jewelry?
A. Carbon
C Sodium
B. Mercury
D. Gold
7. Boiling point, melting point, and density are some of an elements's
A Nonreactive properties
C. Chemical properties
B. Physical properties
D. Pure properties
8. Which of the following is a physical property of compounds?
A Reaction to light
C. Flammability
B. acidity
D. Melting point
Which of the following will NOT break down compounds?
A. Heat
C. Electric current
B. Chemical change
D. Decantation
10. What kind of pure substance is formed when two or more elements are
chemically combined?
A. A solution
C. A suspension
B. A Mixture
D. A compound
11. Which of the following is TRUE about elements?
A. They are impure substances
B. They cannot be classified by their properties alone
C. They cannot be broken down into simpler substances
D. They have more than one kind of particles
12. Which of the following is NOT true about compouds?
A They contain two or more elements
B. They form after a physical change.
C. They have their own physical properties
They do not form
9.Which of the following will not break down compounds?
A.het C.Electric current
B.cidityD.Decantation​