Ch2 Flashcards
Electrons closest to the nucleus are most
strongly attracted. True or false?
True
The atomic number of an atom is determined by the number of—.
Protons
Bonding involves interactions between electrons
in the outer shell. What is another name of the outer shell ?
valence shell
Atoms are considered stable when their
outermost orbital has — electrons.
8
What does “chemically inert element” mean?
The valence shell is complete.
— elements are chemically unstable as valence shells are not full.
Reactive
What do we call a charged particle in chemical bond?
Ion
In hydrogen bond, Hydrogen is attracted to the — portion of polar molecule
negative
Which pattern of chemical reaction does release chemical energy?
Decomposition
Molecules broke down
AB-> A+B
In chemical reaction, synthesis reaction means that molecules are combined and energy is — for bond formation.
Absorbed.
In chemical reaction, exchange reaction involves both — and —
reactions
synthesis, decomposition
AB+C. -> AC+B
Organic compounds are mostly covalently bonded. True or False?
True
Salt is easily dissociate into — in the presence of water
Ions
Acids are proton donors and realse — ions.
Hydrogen
Bases are proton acceptors and release — ions.
Hydroxyl
What is the reaction that acids and bases react to form water and a salt?
Neutralization reaction
What is chemicals that can regulate pH change?
Buffer
What does carbohydrates contain?
Carbon, oxygen, hydrogen
What is two simple sugars joined
by dehydration synthesis?
Disaccharide
What does lipids contain?
carbon, hydrogen, and oxygen
Carbon and hydrogen outnumber oxygen
Triglyceride (neutral fat) is composed of — and —.
Composed of fatty acids and glycerol
What is the basis for all steroids made in the body?
Cholesterol
What does protein contain?
Contain carbon, oxygen, hydrogen,
nitrogen, and sometimes sulfur.
Which organic compounds that is over half of the body’s organic matter?
Protein