What determines the ratio of ions in an ionic compound? O A. The charges on the ions
O B. The electronegativity of each atom
O C. The number of bonds formed
D. The period the atoms are in

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen

Can someone me with questions 15 to 17 plz.

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?