Answer: building block of matter was a particle called the atom.
Explanation: I hope this helps:)
Answer:
I don't know what the correct answer is
Explanation:
Usually, the group number of the element would tell you the amount of valence electrons. In an element, their needs to be a full octet in order for it to be stable (aka happy element). Octet means 8 valence electrons in its orbital.
Answer:
yes it is true they apply necessary safety measures