2. which of the following is an element
a. water
b. sugar
c. salt
d. mercury
3. the vertical column in the periodic table is called _____?
4. what element has the symbol of Pb?
5. how many elements are there in the periodic table?
a. water
b. sugar
c. salt
d. mercury
3. the vertical column in the periodic table is called _____?
4. what element has the symbol of Pb?
5. how many elements are there in the periodic table?
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Answer:
2. water
Explanation:
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