The elements of the periodic table are arranged on order of increasing(1) atomic number
(2) mass number
(3) number of isotopes
(4) number of moles

Choose all the answers that apply. ionic compounds dissolve easily in water do not dissolve in water have low melting points have high melting points conduct electricity when melted

An atom's configuration based on its number of electrons ends at 3p4. another atom has seven more electrons. starting at 3p, what is the remaining configuration? 3p63d34s2 3p43d54s2 3p64s23d3 3p44s23d

What is the percentage of hydrogen in c2h4