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Multiple Choice
Direction: Choose the letter of the best answer. Write the chosen letter on a separate sheet of paper.
1. Which does not describe an element?
A. Examples are aluminum, gold and carbon
B. Represented by a chemical symbol
C. It cannot be decomposed into simpler substance
D. Consists of two or more kinds of atoms
2. Which is not a compound in the given substances?
A. baking soda B. rusted iron nail C. silver spoon D. carbon dioxide
3. Which description does not refer to a compound?
A. Consists of only one kind of atom B. It can be decomposed into simpler substance C. Composed of
two or more kinds of atoms D. Examples are water, salt and calcium fluoride
4. Which of the following is an element?
A. Magnesium oxide B. Potassium C. NaOH D. Dry ice
5. The following are compounds except_
A. phosphorus B. sodium chloride C. calcium oxide D. sugar
II.
Fact or Bluff
Direction: Decide whether the given information is a FACT (correct) or a BLUFF
(incorrect). Write F for fact or B for bluff.
1. C is the chemical symbol for calcium
2. The element argon can be written as Ar
3. In the periodic table tungsten is W
4. K stands for sodium
5. Ferrum is the Latin name of copper
6. Element mendelevium is named after Dmitri Mendeleev
7. The name of element Neptunium is named after the planet Neptune
8. P stands for potassium
9. Oxygen is represented by the symbol O
10. The chemical symbol for helium is H.
Answers
lemon
because we are going
Answer:
The letter of the best answer is chosen and written below:
1. Which does not describe an element? D. Consists of two or more kinds of atoms
Element contains only one type of atom.
A. Examples are aluminum, gold and carbon
B. Represented by a chemical symbol (eg gold is represented by Au)
C. It cannot be decomposed into simpler substance (Element is composed of only one type of atom, hence decomposition is not possible)
2. Which is not a compound in the given substances? C. silver spoon
A. baking soda B. rusted iron nail D. carbon dioxide
3. Which description does not refer to a compound? A. Consists of only one kind of atom (This description is of element)
B. It can be decomposed into simpler substance C. Composed of
two or more kinds of atoms D. Examples are water, salt and calcium fluoride
4. Which of the following is an element? B. Potassium
A. Magnesium oxide C. NaOH D. Dry ice
5. The following are compounds except_A. phosphorus
B. sodium chloride C. calcium oxide D. sugar
F for fact or B for bluff is written below -
1. C is the chemical symbol for calcium B
2. The element argon can be written as Ar F
3. In the periodic table tungsten is W F
4. K stands for sodium B
5. Ferrum is the Latin name of copper B
6. Element mendelevium is named after Dmitri Mendeleev F
7. The name of element Neptunium is named after the planet Neptune F
8. P stands for potassium B
9. Oxygen is represented by the symbol O F
10. The chemical symbol for helium is H. B