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DENIUS [597]
3 years ago
5

Where did the following drugs originate from?

Biology
1 answer:
mihalych1998 [28]3 years ago
5 0
Aspirin comes from the bark of the Willow tree. Ancient Egyptians used the tree bark first.
Penicillin is mold Penicillium chrysogenum<span>) and was found on fruit in 1928. 
 </span>

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4. Which of the following elements does not want to have eight valence electrons? a. magnesium c. hydrogen b. oxygen d. nitrogen
Cloud [144]

Answer:

Hydrogen.

Explanation:

Hydrogen is the simplest chemical element that exists. The symbol for the chemical element Hydrogen is "H" and it is a colourless, tasteless, odorless, and highly flammable gas.

Hydrogen is a chemical element found in group (1) of the periodic table and as such it has one (1) electrons in its outermost shell. Therefore, Hydrogen has an atomic number of one (1) and a single valence electrons because it has only one proton and one electron in its nucleus.

Based on the octet rule which states that atoms of chemical elements gain, lose or share electrons so as to have eight (8) electrons in their valence shell. Therefore, atoms of chemical elements bond in order to attain the electronic configuration of a noble gas i.e a full valence shell which comprises of eight (8) electrons.

However, the chemical element "Hydrogen" is an exception to the octet rule because it is only able to hold a maximum of two (2) valence electrons in its outermost shell to become full.

<em>Hence, Hydrogen is an element which does not want to have eight valence electrons. </em>

7 0
3 years ago
Please help!! i need to know asap
Damm [24]
A: Population
If a group of one certain species are living in the same area they are a population. The same goes for humans, we are the same species and when we live in the same area we say we are part of a population. That’s why you would hear things like “the population of massachusetts is 2million” or whatever it is.
7 0
3 years ago
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Which are common to both aerobic and anaerobic respiration? Check all that apply.
murzikaleks [220]

Answer:

The answer is <em><u>GLUCOSE</u></em>.

Explanation:

This is the process which is common in both aerobic and anaerobic respiration.

5 0
3 years ago
Which chemical reaction would result in the greatest release of energy for an organism
aliya0001 [1]
Cellular respiration
6 0
3 years ago
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The phenomenon of fusion is likely to occur when, after a period of geographic isolation, two populations meet?
irinina [24]
The right answer for the question that is being asked and shown above is that: "a decreasing number of viable, fertile hybrids is produced over the course of generations." The phenomenon of fusion is likely to occur when, after a period of geographic isolation, two populations meet is that <span>a decreasing number of viable, fertile hybrids is produced over the course of generations.</span>
6 0
3 years ago
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