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.​

Lewis structure and molecular geometry for nh2cl

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

Select the word from the list that best fits the definition the nuclear family into which a person is born or adopted.