Question

write the names and symbols of the first four elements found in group 1st and 2nd of mendeleev's periodic table?​

Answer 1

Explanation:

What are the 3 parts of a chemical equation?

What type of reaction is shown in the equation below 2h2o → 2h2 o2?........................

Answer 2

Answer:

1) Hydrogen ( H)

2)Helium (He)

3) Lithium (Li)

4) Berillium (Be)