Which of the following pairs of elements is most likely to form an ionic compound? a) calcium and chlorine b) oxygen and fluorine c) nitrogen and sulfur d) sodium and aluminum

Can someone me with 1 to 4 plz. fast

Free answer. the treaty of versailles ended world war i, but some of the terms of the treaty contributed to the beginning of world war ii. which was one of the terms of the treaty? the answer would be "germany was forces to pay reparations to the allied countries.". i hope this .

Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?