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natulia [17]
2 years ago
14

Select the elements that have 4 valence electrons.

Biology
1 answer:
Free_Kalibri [48]2 years ago
7 0
Carbon has 4 valence electrons
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What is an advantage of using nuclear power?
My name is Ann [436]
<span><span>Large nameplate capacity per plant, typically around 1 GW.
</span><span>Typically 90% capacity factor, maximizing output from the nameplate capacity.
</span><span>Small fuel transportation volumes as the fissionable material just isn't that big or heavy compared to equivalent fossil fuel BTU sources.
</span><span>Low CO2 per MWH on a full life cycle basis. ~12 grams which is only slightly more than wind / solar.
This is a reason nuclear is a much better source for one of the major pressing problems of today than fossil fuels: global warming.</span>No particulate matter pollution.No sulfur dioxide or other chemical pollution.<span>Low fatalities per TWH. 
Nuclear is higher than renewables according to current statistics, but much, much lower than fossil fuel generation.</span></span>

Nuclear power generates lots of clean, stable energy.

8 0
3 years ago
Read 2 more answers
1. What might cause an increase or decrease of carbon dioxide in a given location such as in the atmosphere or buried under grou
AVprozaik [17]

1. The carbon-dioxide increases in atmosphere by fossil-fuels, decaying-dead, automobiles etc. and when animals or plant die they get buried and carbon content increases under the ground.

2. Greenhouse gas are those gases which trap heat in the atmosphere and maintain the temperature of the earth.

3. Diamond and graphite are solid forms of carbon.

4. Dry ice is the carbon as liquid.

5. Autotrophs make simple sugar glucose via photosynthesis and this sugar is used by heterotrophs as a substrate for respiration in the presence of oxygen.

Explanation:

When the fuels from automobiles, fossil-fuel, dead decaying organism release carbon in the atmosphere, the increase in carbon dioxide is the cause of global warming.

Greenhouse gases absorb the infrared radiations from the earth's surface and reradiate it back to the atmosphere. In short greenhouse gases allow sun's rays to pass through and maintain the earth's temperature otherwise the earth will become too cold to sustain lives.  

7 0
2 years ago
Which of these is a pure substance . dimond . salt . ocean water a. a and b. b and c
Mazyrski [523]
I think salt is it                                            
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7 0
2 years ago
Read 2 more answers
The earth is sometimes described as a giant magnet. True or false?
dybincka [34]
True. The crust of the Earth has some permanent magnetization, and the Earth's core generates its own magnetic field, sustaining the main part of the field we measure at the surface. So we could say that the Earth is, therefore, a "magnet."
4 0
2 years ago
14. A food web is shown below.
anzhelika [568]

Answer:

it's E) hawks

Explanation:

because the energy gets smaller as the predators increase.

6 0
3 years ago
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