In what ways can you determine the number of valence electrons in an atom using the periodic table? (select all that apply) Group of answer choices

The number of valence electrons equals the number in the ones place for groups 3-12

The number of valence electrons equals the number in the tens place for groups 1,2 and 13-18

The number of valence electrons equals the number in front of the "A" for groups 1A-8A

The number of valence electrons equals the number in the ones place for groups 1,2 and 13-18

Which is a difference between molecular compounds and ionic compounds? select the correct answer below: question 5 options: molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. molecular compounds are formed of discrete, neutral molecules, while ionic compounds are formed of large repeating arrays of opposite charges. molecular compounds have high melting points and high boiling points, while ionic

Find the mass in grams of 1.37x1020 particles of h3po4

Which of the following electromagnetic waves can create ions?