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Mercedes Q.
Molecular Biology Researcher
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Chemistry
TutorMe
Question:

What are the 3 subatomic particles that create an element? What are their charges and where to they reside?

Mercedes Q.
Answer:

An atom, the smallest particle of which an element is made without loosing its identity, consists of 3 subatomic particles: protons, neutrons and electrons. Protons are charged particles that reside, along with the neutral charged sub-particles called neutrons in the nucleus of the atom; according to Rutherford's atomic theory. This nucleus, uniquely identifies each element according to the number of protons in the nucleus. Electrons, however, are negatively charged sub-particles that reside outside of the nucleus in what is called the electron cloud that surrounds the nucleus.

Biochemistry
TutorMe
Question:

What does tRNA do inside of the cell?

Mercedes Q.
Answer:

tRNA ( transfer RNA) is a molecule that alings with mRNA (messenger RNA) by complementary base pairing between 3 nucleotide segments (codons) to transfer a specific amino acid covalently bonded to form a protein.

Basic Chemistry
TutorMe
Question:

Why are double bonds stronger than single bonds?

Mercedes Q.
Answer:

In covalent bonding, a pair of electrons is shared between two atoms from the outermost shell of the atom (valence shell), in order to achieve an electron configuration similar to a noble gas (rule of eight or octet rule); thus making the atoms more stable. A single bond shares 2 electrons between the 2 atoms (sigma bond), while double bonds share 4 electrons between 2 atoms (1 sigma and 1 pi bond). Sharing a higher amount of electrons between atoms reduces the distance between 2 atoms, and requires more energy to break, thus making a double bond stronger than a single bond.

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