D) Manganese (VII) oxide עו
CHAPTER REVIEW QUESTIONS
Is are
ompound
Answer the following questions
1. What is the difference between atoms and molecules?
2. Why are elements classified into metals, non-metals and
metalloids?
3. What is the difference between chemical symbol and chemical
formula? Give example for each of them.
4. List the symbols for the following elements: Iron, Sodium,
Antimony, Tungsten. Explain why these symbols do not correspond
to the English names of the elements.​

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3

they all get energy from eating other animals, dead animals to be more precise.

hienas tends to steal pray from other animals. crows and vultures tend to eat dead animals and leftovers.

hope it ,

bioteacher101