If an atom has six electrons in its second shell and its first shell is filled, it will tend to a. gain two electrons in its second shell
b. lose all of its electrons from its outer shell
c. lose all of its electrons from its inner shell
d. gain four electrons in its outer shell
6.
The formula CO2 means
a. an atom contains two carbon molecules and one oxygen molecule
b. an atom contains one carbon molecule and two oxygen molecules
a molecule contains two carbon atoms and one oxygen atom
d. a molecule contains one carbon atom and two oxygen atoms
7.
Compounds covalently bonded
a. yield hydrogen atoms upon decomposition
b. produce charged particles when dissolved in water
c. are produced by sharing electrons
d. are formed by an exchange of electrons from inner shells
Which of the following compounds is an acid?
KPH K+ + OH
c. CC14 +
8.

Melissa lives in a town called greendale. she discovers that when she lights a match and holds it near her kitchen faucet, the little flame grows into a larger fire. melissa is surprised because she thought the water would extinguish the flame rather than ignite it further. her mother tells her that the water might be contaminated with dissolved methane, a primary component in natural gas. melissa investigates the matter and finds that cases of methane contamination started shortly after a company began fracking for natural gas in the area. based on this information, which three statements are plausible consequences of fracking in greendale?

Getting out of bed is the first goal i tackle each day. 2several small goals are achieved by me as the day progresses. 3when i am riding the bus home or walking the dog, i think about the bigger goals i have for my life. which statement correctly describes the verb tense, aspect, and voice in this paragraph? a.sentences 1 and 2 contain present progressive verbs. sentence 3 contains both present progressive and simple present verbs. sentence 2 uses passive voice. b.sentences 1 and 2 contain simple present verbs. sentence 3 contains present progressive verbs. all three sentences use active voice. c.sentences 1 and 2 contain present progressive verbs. sentence 3 contains simple present verbs. all three sentences use active voice. d.sentences 1 and 2 contain simple present verbs. sentence 3 contains both present progressive and simple present verbs. sentence 2 uses passive voice.

Which spheres are involved when sedimentary rocks formed from parts of seashells at the bottom of the ocean? a.) biosphere, atmosphere, geosphereb.) geosphere, hydrosphere, biosphere c.) geosphere, exosphere, hydrosphered.) hydrosphere, biosphere, atmosphere