Question

6. Mass from Sol is lost at the rate of
A. 50,000,000 tons per second
B. 5,000,000 tons per second
C. 500,000 tons per second
D. 50,000 tons per second

7. The helium flash results
A. in a planetary nebula
B. in an expanding atmosphere of hydrogen
C. from the fusion of helium
D. all of the above

8. The final element in the nuclear fusion series of massive stars is
A. oxygen
B. carbon
C. iron
D. uranium

9. Life is comprised of the smaller elements because they are
A. more reactive
B. soluble in water
C. all found in the gaseous state
D. the most common

10. The electronegativity values of atoms
A. determine a molecule's total charge
B. are highest among noble gases
C. determine the types of bonds within a molecule
D. must be different for chemical bonds to form

Answer 1

6A. 50,000,000 tons per second

7C. from the fusion of helium

A helium flash is a very brief thermal runaway nuclear fusion of large quantities of helium into carbon through the triple-alpha process in the core of low mass stars during their red giant phase.

8

9A. more reactive

10C. determine the types of bonds within a molecule

Electronegativity is a measure of the tendency of an atom to attract electrons (or electron density) towards itself. It determines how the shared electrons are distributed between the two atoms in a bond. The more strongly an atom attracts the electrons in its bonds, the larger its electronegativity