Answer:
Fr
Explanation:
Francium (Fr) has the lowest ionization energy, with a value of 4.0727eV. This ionization energy increases as one advances in a period, being greater in the group of nonmetals.
Covalent example ch4 where carbon is covalently bonded with all 4 hydrogens
Answer:
it cannot be separated by physical methods
Explanation:
Correct Answer: compound because the atoms of the elements are combined in a fixed proportion.
Compact fluorescent bulbs because they made out of glass that will break and will dye and then they can't be used again
