D. Fill in the blanks.
1. The first element in the periodic table is
3.
2. Hydrogen is the most
element in the universe.
3
is formed when hydrogen is
burned in air.
4. Hydrogen can be prepared by the action of
dilute
on metals.
5. Ethylene is an intermediate in the
manufacture of
Answers
Answered by
3
1.Hydrogen
2.helium
3.hydrogen (H2) and oxygen (O2)
4.HCl or Dilute H2SO4 on the metals
5.intermediate in the production
Answered by
0
Explanation:
1) hydrogen
2)yes
3)water
4)true
5)ethanol
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