An atom has 18 protons and 8 valence electrons which statement would best identify this element

H2O2 (aq) = O2 (g) in acidic solution

What does multivalent mean?

Which notation designates a possible value for a principal energy level in an atom? px 2 +1/2 s

When c=o change to c-o in a molecule what happen the bond length and strength?

What is the pOH of a 0.025 M [H+] solution?

Is the equation above balanced? How do you know? Mg + 2HCl → MgCl2 + H2

What characteristics do atoms of carbon-12, carbon-13, and carbon-14 have in common?

Which of the following changes would decrease the rate at which a solid solute dissolves in a liquid solvent? A. Decreasing pressure B. Decreasing surface area C. Increasing rate of stirring D. Increasing temperature

Helium, neon, and argon are examples of A) metals B) metalloids C) noble gases D) transitional metals

How many moles of MgS2O3 are in 201 g of the compound