Which of the following is similar among all living organisms on earth?
a. cellular function
b. social behavior
c. physical appearance
d. all of these

Which of the following electromagnetic waves can create ions?

Write the formula for the following chemicals. 7. e. trinitrogen tetraoxide a calcium phosphate f. magnesium acetate b. potassium sulfide g nickel(iii) cyanide c carbon dioxide h. silver sulfate d. cobalt(ii) chloride

If an atom has 12 protons and 13 neutrons