Answer: For question one: Electrons have a negative charge and protons have a positive charge while neutrons have no charge at all all of these form an atom
for question two: The metals are situated on the left-hand side of the periodic table and are separated from non-metals by the zig-zag line present in the periodic table. There are many types of metals that are present in the earth's crust.
Question three: The atomic number (represented by the letter Z) of an element is the number of protons in the nucleus of each atom of that element.
Question four ( btw I'm giving the answers so don't mind me saying question lol): The s-, p-, and d-block elements of the periodic table are arranged into 18 numbered columns or groups. The elements in each group have the same number of valence electrons. As a result, elements in the same group often display similar properties and reactivity.
That was all I could solve Hope this helps <3