Which of the following substances can be used to neutralize HF? Question options:

A) HCl

B) NaOH

C) HF

D) SO2

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

What is the standard unit of measure for acceleration?