WHAT IS LIFE LL W/ LAUNCHPAD
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ISBN: 9781319231859
Author: PHELAN
Publisher: Macmillan Higher Education
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Chapter 2, Problem 2SA
Summary Introduction
To review:
Why atoms with a complete outer shell are unlikely to form bonds.
Introduction:
An atom is most stable when its outermost shell is filled.
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The “octet rule” in chemistry helps predict the types of bonds thatatoms will form. In general, an atom will be most stable if it fills itsouter shell of 8 electrons. Atoms with fewer than 4 valence electronstend to donate electrons and those with more than 4 valence electronstend to accept additional electrons; those with exactly 4 can do both.Using this rule, determine what category each of the followingelements falls into: N, S, C, P, O, H, Ca, Fe, and Mg. (You will needto work out the valence of the atoms.)
Which of the following types of bonds are not involved in maintaining the tertiary
structure of proteins?
A) Hydrogen Bonds
B) Disulfide Bonds
C) Ionic Bonds
D) Peptide Bonds
Why are hydrogen bonds relatively weak?
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- Visit this website (http://openstaxcollege.org/l/ptable) to view the periodic table. In the periodic table of the elements, elements in a single column have the same number of electrons that can participate in a chemical reaction. These electrons are known as valence electrons. For example, the elements in the first column all have a single valence electron—an electron that can be donated in a chemical reaction with another atom. What is the meaning of a mass number shown in parentheses?arrow_forwardWhy are hydrogen bonds so important in biological systems, considering that they are so weak?arrow_forwardSome prokaryotic and all eukaryotic cells use oxygen to harvest energy from food molecules. In what form is that energy available to power cell work? a) b) c) glucose molecules d) fat molecules ATP molecules heat and light P Sunlight energy ECOSYSTEM Photosynthesis in chloroplasts Cellular respiration in mitochondria ATP (for cellular work) ww www Heat energyarrow_forward
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