How many electrons are in the n = 2 shell of the oxygen atom before bonding?

Answers

Answer 1

Answer:

Answer: 6 electrons

Explanation: Oxygen atom has atomic no of 8 which means it has got 8 electrons. n=2 depicts that the electrons have principle quantum no = 2. According to Afbau's rule the electrons are arranged in shells of increasing energy as follows:

$O(8)-1s^22s^22p^4$

Thus there are 2 electrons in 2s and 4 electrons in 2p which makes a total of 6 electrons.

Answer 2

Answer: 6 electrons are in then 2nd shell, this is because oxygen has 8 electrons and two are already in the first shell leaving only 6 left to go into the 2nd shell

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In the context of the difference threshold, _____ is the principle that two stimuli must differ by a constant proportion to be perceived as different.
Is a chameleon a lizard?
Because the flow speed in your capillaries is much less than in the aorta, the total cross-section area of the capillaries considered together must be much larger than that of the aorta. Given the flow speeds noted, the total area of the capillaries considered together is equivalent to the cross-section area of a single vessel of approximately what diameter
Which of the following is a value of biodiversity?A. Pollution B. Climate change C. Invasive species D. Healthy ecosystems

Explain why changes in climate can result in the extinction of a species.

Answers

The changes in environment can cause the raising of the sea level, which can push animals further inward, which in turn destroy habit, as they began to get clumped together vegetation begins to go away, thus resulting in less species, also hotter climate makes sure that animals with very heavy coats of fur, die out pretty quickly if not cooled (over heating)

Changes in climate (too hot or too cold) can affect multiple spiecies of animals due to disappearance of their habitats or/and food.
Every living animal and plant is part of the food chain. If the food chain is broken, many species would be in danger of extinction.

Which foodborne organism creates havoc within the gastrointestinal tract by producing a toxin?

Answers

Samonella. They cause quite a nasty response in the gut!

Answer:

E. coli

Explanation:

Which of the following is NOT an example of chemical weathering?a. natural plant acid breaking down a rock
c. oxidation of metals
b. acid rain deteriorating a marble statue
d. ice wedging in rock

Answers

The correct answer is "a. natural plant acid breaking down a rock" because physical weathering breaks down rocks and chemical tears down rocks.

Answer:

The answer is D. ice wedging in rock

Explanation:

NEED HELP DUE TODAY PLZ HELP ME!!!!A scientist is trying to identify an unknown cell.

He determines that it has a nucleus and lysosomes. It also contains a cell membrane, but does not have a cell wall.

What type of cell is the scientist most likely looking at?

Choose 1 answer:

(Choice A)
A
Bacteria

(Choice B)
B
Plant cell

(Choice C)
C
Fungal cell

(Choice D)
D
Animal cell

Answers

Answer D- animal cell

Answer:

most probably the answer is likely to be an animal cell

Which level of organization includes all the other levels of organization? a. biosphereb. ecosystem
c. organism
d. cell

Answers

The answer is A. Biosphere.

Which statement is true about ocean thermal energy conversion (OTEC)?It is a mineral that contains one or more elements of economic value.
It is the thinning of the stratospheric ozone that occurs over the poles in the spring.
It is the use of temperature differences in ocean water to produce electricity.
It is the process of obtaining information by using the senses.

Answers

The correct answer is: It is the use of temperature differences in ocean water to produce electricity.

Thermal gradients that are formed between warmer surface and colder deep water are used for energy production. That temperature difference is used to produce electricity and for desalination of ocean water. Difference between water levels must be at least 77o Fahrenheit to power a turbine.

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Cells produced by the root and shoot tip meristems become the tissues of the plant body. primary secondary