What is the difference between homogeneous and heterogeneous mixtures?

The electron configurations of two different atoms are shown below. each yellow electron has a charge of 1−, and the net charge of each nucleus is shown. these atoms will combine with bond. a. an ionic b. a positive c. a negative d. a covalent plzzz mee with !

Why do cells appear different in distilled water than they do in 10% salt water?

Can anyone answer these questions? ? i need it before 1: 00pm today