Guys please i need ur help 1-Name the elements in gp1.
2-Why are these elements placed in gp1?
3-Mention the trends in atomic size, atomic number, mass number, reactivity, boiling & melting points.

An experimental procedure requires a 10 ml of acid to be dissolved

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.

What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures