ionic bonding ,lewis dot structures,electronegativity

0.0(0)
studied byStudied by 0 people
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Get a hint
Hint

why do we care abt chemical bonding?

Get a hint
Hint
  • the structure of molecules basically determines their function

    • metabolism = chemical reactions on reactants done by enzymes

    • DNA transcription= protein attaches to DNA to start this process

    • how does the protein/enzyme know which reactant is connect one for it or where to go?

  • structure of these molecules is the reason for this process

    • structure comes from bonding of the atoms together

Get a hint
Hint

types of chemical bonds:

Get a hint
Hint
  • bonds form bw atoms to form molecules

    • molecules form bc atoms that make them up are more stable than individuals atoms

Card Sorting

1/10

Anonymous user
Anonymous user
encourage image

There's no tags or description

Looks like no tags are added yet.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

11 Terms

1
New cards

why do we care abt chemical bonding?

  • the structure of molecules basically determines their function

    • metabolism = chemical reactions on reactants done by enzymes

    • DNA transcription= protein attaches to DNA to start this process

    • how does the protein/enzyme know which reactant is connect one for it or where to go?

  • structure of these molecules is the reason for this process

    • structure comes from bonding of the atoms together

2
New cards

types of chemical bonds:

  • bonds form bw atoms to form molecules

    • molecules form bc atoms that make them up are more stable than individuals atoms

3
New cards

3 types of chemical bonds:

  • metal w/non metal: ionic bond

    • electrons actually transferred from non metal to metal

  • non metal w/non-metal:covalent bond

    • sharing of electrons

  • metal w/ metal

    • sharing “sea” of electrons

4
New cards

properties of NaCl (sodium chloride):

  • forms colorless crystal that is cubic and are hard and brittle

  • high Mp (802 degrees)

  • conducts electricity when melted (but not in solid- so not metallic or like graphite)

5
New cards

simple ionic compounds:

  • contain a metal and a non metal (eg. Na (left side metal) Cl (right side non metal))

    • has one element with low electronegativity (metal)

    • has one element with high electronegativity(non metal)

  • metals form cations, configurationnon metals form anions

    • each ion typically achieves noble gas congfiguration

    • why? trade off bw energy required to gain or lose electrons and stabilization of the system when ionic bonds are formed

  • ionic compounds are neutral

6
New cards

sodium chloride:

  • what color is Na+(cation +)?

    • purple (smaller one)

    • cations get small and shrink bc of the imbalance of protons pulling on electrons

  • each Cl- is surrounded by Na+ ions

  • each Na+ is surrounded by 6 Cl- ions

7
New cards

cations:

  • positively charged

  • smaller than corresponding atom (protons > e-= protons imbalance)

  • simple cations form when metals lose electrons (ie elements with low electronegativity) (Na 3s1 →3s0 => [NE]

  • charge usually corresponds to loss of electrons back to “core” but not bc this is more stable loss of electrons always requires energy

  • why do cations form then? (Na+=Cl- → much more stable)

    • be highly charged ions form stronger bonds-which are more stable

8
New cards

anions:

  • negatively charged

  • larger than corresponding atom

  • simple anions formed when non metals gain electrons (ie elements w high electronegativity)

  • charge usually corresponds to gain of electrons to the next filled (sub) shell (ie noble gas configuration)

9
New cards

what charge do u expect on :

  1. K (metal/cation +1) +1

  2. Mg (metal/cation) +2

  3. AL (metal /cation) +3

  4. S (nonmetal/anoin) -2

  5. Br (non-metal/anion) -1

10
New cards

an atom has a valence configuration of S2 P3.what ion will it form in an ionic compound?

-3

11
New cards

* transition metal ions always form a 2+ ion (and often others as well)