18. In which pair of atoms do both nuclei contain the same number of natron (1) Li and Be
(2) K and a
(3) Ca and AB
(4) n and o

How many molecules are found in 1.32 mol of nacl?

The bone of a dinosaur and the imprint of a leaf are examples of which kind of fossils? a) index b) body c) amber d) trace

Which of these describes how heat is transferred by convection* a. sunlight travels through space without the aid of fluids or solids. b. warm air rises and takes the heat with it, eventually, it cools and sinks c. air at the equator rises and sinks at the poles. d. air molecules touch the warm ground, heating them up *not conduction