4. Mendeleev created the first periodic table by arranging elements in order of A. Decreasing atomic mass.
B. Increasing atomic mass.
C. increasing atomic number.
D. Increasing melting points and densities.

pls help

Which statement correctly describes potassium iodide, ki? there is a one-to-one ratio of potassium ions to iodide ions. potassium gains electrons and iodine loses electrons during the reaction. the lattice is held together by potassium anions and iodide cations.

Stage in which a typical star has completely stopped fusion

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.