Sodium, atomic number 11, forms an ionic bond with an atom of an unknown element. what is one possible choice for the other element in the compound?

An ionic bond is a kind of chemical bond produced via an electrostatic association between the two oppositely charged ions. Ionic bonds are produced between a cation, that is, generally a metal, and an anion, that is, generally a non-metal. A covalent bond involves a pair of electrons being shared among the atoms.

For example, consider sodium cations and chlorine anions. Sodium has a positive 1 charge and chloride has a negative 1 charge. Thus, one sodium cation cancels one chloride anion leading to the formation of NaCl.

1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.

answer; (phospholipid);