Is opposite poles repel each other why does the north end pf a compass point to the north pole

Which of the following elements would you expect to have the lowest ionization energy value? fluorine, lithium, neon, nitrogen

Ahydrogen atom has 1 electron. how many bonds can hydrogen form? a) 1 b) 2 c) 3 d) 4 e) 5

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.