1. An element is defined as _______
A. a uniform substance
B. a substance with a constant composition C. a substance that contains two or more substances in definite proportion
D. a substance that cannot be separated into two or more substances by ordinary or chemical means
2. The silvery liquid used inside thermometers is what we call as mercury. Mercury is an example of ________
A. a mixture
B. a solution
C. an element
D. a compound
3. What property of an element is shown when a Grade 7 learner reported to his teacher that he uses 0.40 g of sodium crystals in his experiment procedure?
A. Acidity
B. color
C. mass
D. toxicity
4. Which of the following substances in an example of an element?
A. fruit salad
B. ice candy
C. iron nail
D. spaghetti
5. All of the following substances are considered elements EXCEPT ________
A. Gelatin
B. gold ring
C. Iron grills
D. neon lights
6. Which substances contain elements in its composition?
A. nail, spoon, and fork
B. milk, salt, and bananas
C. ring, orange juice, and seafood
D. all of the above
7. Which property refers to an element's shiny appearance?
A. Acidity
B. luster
C. malleability
D. oxidation
8. Which property refers to element's capacity to be burnt easily?
A. Color
B. flammability
C. mass
D. toxicity
9. A student found out in her research that mercury can be poisonous in larger amounts but this element is naturally occurring and is taken in small quantities specially in seafood. What property of the element is being referred to in this item?
A. Acidity
B. color
C. flammability
D. toxicity
10. Which property refers to element's amount in material it contains?
A. Mass
B. shape
C. stability
D. volume​