What does the energy turn into when a lamp goes from unplugged to plugged

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

Why does his teacher ask him to balance the equation by including the correct coefficient

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided