Answer:
I think the answer should be 147
Explanation:
Atomic number Carbon = 6
14 mass - 6 protons = 8 neutrons
mass (protons+neutrons) - atomic number (protons #) = neutrons #
Answer:
The three dimensional structure of a protein has the following levels: primary, secondary, tertiary and Quaternary.
1. Primary structure of protein is the unique order or <u>sequence of amino acids</u> in a polypeptide chain. The amino acids are linked together by<u> peptide bonds.</u>
2. Secondary structure of protein is the <u>folding or coiling of the polypeptide</u> chain to form a three dimensional structure. It is of two types: α-helix and β-sheets. This structure is stabilized by <u>hydrogen bonding</u>.
3. Tertiary structure of a protein refers to the<u> compact globular structure</u> stabilized by <u>non-specific hydrophobic interactions, hydrogen bonding, salt bridges and disulfide bonds</u>.
4. Quaternary structure of a protein is formed by the<u> aggregation of multiple polypeptide chains.</u> It is stabilized by <u>non-covalent interactions and disulfide bonds.</u>
Answer:
Atomic size decreases from left to right in the Periodic Table.
Explanation:
s you move from left to right, the nucleus gains protons.
This increases the positive charge of the nucleus and its attractive force on the electrons.
At the same time, electrons are added to the atoms as you move from left to right across a period.
These electrons reside in the same energy shell and do not offer complete shielding.
The effect of the increasing proton number is greater than that of the increasing electron number.
As a result, the valence electrons are held closer to the nucleus, and the atomic radius decreases.
Hg2O -> O2 + Hg
2Hg2O -> O2 + 2Hg
20g-> ?g + 18.6g
(1 molHg2O ) (1 mol O2) (32g O2)
20g 2Hg2O x ------------------- x ------------------- x -------------- = 0.77g O2
(834.36Hg2O) (1 mol Hg2O) (1 mol O2)