Covalent bonds are formed when two atoms are able to <em>share</em> electrons.
Iroinic bonds are form when two atoms are <em> </em> electrons from each other to complete the bond. This results in a pair of ions.
<u>Covalent bonds:</u>
- Have a definite shape.
- Have a low melting point.
- At room temperature they are in a liquid or gas.
- They occur between two non-metals.
<u>Ionic bonds:</u>
- Have no definite shape.
- Have a high melting point.
- At room temperature they are solid.
- They occur between a metal and a nonmetal.
Answer:
A
Explanation:
I know this because I just took the test and got it right.
In my opinion, humans have influenced climate change because it has been shown that deforestation, industrial activities and urbanization increase the level of greenhouse gases.
<h3>What is global warming?</h3>
The expression global warming makes reference to the sudden increase in temperatures around the world after the industrial revolution.
In this regard, it has been shown that greenhouse gases such as CO2 can increase global warming and human activities may be associated with this process.
In conclusion, in my opinion, humans have influenced climate change because it has been shown that deforestation, industrial activities and urbanization increase the level of greenhouse gases.
Learn more about global warming here:
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The phospholipids form a bilayer in water because of hydrophobic and hydrophilic interactions. The hydrophobic tails do not interact with water
Answer:
C. They break down food materials into forms the cell can use.
