Bonds & Details

Question 0

Covalent bond

When the electrons are not shared equally, it is called?

Answer 0

Electrons shared between 2 atoms

The bond is considered polar

Question 1

Ionic bond?

Why does the bond stay together?

Answer 1

Electrons are taken and given away, resulting in charged particles.
Bond stays together due to electrical attraction

Question 2

Covalent bonds result in what shapes?

Ionic bonds?

Answer 2

Covalent- VSEPR shapes

Ionic- crystals

Question 3

Are acids an ionic or covalent bond?

What does the hydrogen act like?

Answer 3

Ionic

Like a cation

Question 4

Cation vs anion

Answer 4

Cation- the positively charged ion

Anion- the negatively charged ion

Question 5

What do covalent bonds form, while ionic bonds do not?

Answer 5

Molecules

Question 6

Valence electron

Answer 6

An electron in the outermost energy level of an atom that can participate in bonding

Question 7

Unshared pair (lone pair)

Answer 7

A nonbonding pair of electrons in the valence shell of an atom.

Question 8

Single bond

Answer 8

A bond in which two atoms share one pair of electrons

Question 9

Triple bond

Answer 9

Covalent bond in which 2 atoms share 3 pairs of electrons

Question 10

Double bond

Answer 10

Covalent bond in which 2 atoms share 2 pairs of electrons

Question 11

Resonance structure

Answer 11

Possible Lewis structure of a molecule for which more than one Lewis structure an be written

Question 12

Lewis structure

Answer 12

A structure in which atomic symbols represent nuclei and inner-shell electrons and in which dots are used to represent valence electrons

Question 13

What does VSEPR theory predict?

Answer 13

The 3-D formation of a molecule, shape of the molecule

Question 14

The shape of molecules that contain only 2 atoms is

Answer 14

linear

Question 15

Why is there not resonance structures of CO despite its triple bond?

Answer 15

There is no other way of making a different structure

Question 16

Electronegativity

Answer 16

Tendency of an atom in a molecule to attract shared electrons to itself

How good an atom is at attracting electrons to its nucleus

Question 17

Is “polar ionic” possible? Why or why not

Answer 17

No, Because in order to be polar, the en has to be less than 2 and greater than .5. If a bond is ionic, it will have an electronegativity greater than 2 meaning that it will never be polar.

Question 18

When should you use electronegativity to calculate whether or not a bond is polar?

Answer 18

When it is a covalent bond

Question 19

What does VSEPR stand for?

Answer 19

valence shell electron pair repulsion

Question 20

Why are nonpolar covalent bonds not common?

Answer 20

Because one atom usually attracts electrons more strongly than the other

Question 21

Nonpolar covalent bond

Answer 21

Attraction between two atoms in which bonding electrons are shared equally between the atoms

Question 22

Polar covalent bond

Answer 22

Attraction between two atoms in which bonding electrons are localized on the more electronegative atom

Question 23

Where on the periodic table is electronegativity the highest?

Answer 23

Upper right hand side

Question 24

Where on the periodic table is electronegativity the lowest?

Answer 24

Bottom left hand side

Question 25

Dipole molecule

Answer 25

One that has a partial positive charge at one end and a partial negative charge at the opposite end

Question 26

In general, if the difference in electronegativity between 2 atoms is between 0 & .4 the bond formed is...

Answer 26

Non polar covalent

Question 27

If the difference in electronegativity between 2 atoms is between .4 and 2 the bond formed is...

Answer 27

Polar covalent

Question 28

If the electronegativity difference between 2 atoms is greater than 2 the bond formed is...

Answer 28

Ionic

Question 29

If one atom has more electronegativity, then it is partially ____

Answer 29

Negative

Question 30

The positive atoms shown in dipole moment arrows go where?

Answer 30

Towards the partially negative atom because it has more electronegativity

Question 31

What is meant by unequal sharing of electrons in a polar bond?

Answer 31

More electronegative atoms pull on shared electrons more than the other atom so the charge is not evenly distributed -> opposite sides -> opposite charges

Question 32

If their are lone pairs on the center element of the covalent bond, is it a polar or nonpolar molecule?

Answer 32

Polar

Question 33

No lone pairs. Polar or nonpolar molecule?

Answer 33

Nonpolar

Question 34

If dipole moments cancel out, is the molecule polar or nonpolar?

Answer 34

Nonpolar

Question 35

If the dipole moments don't cancel & there are lone pairs, the molecule is...

Answer 35

Polar

Question 36

Right on the periodic table, what happens?

Answer 36

Nucleus gets bigger so it's easier to steal electrons (more en)

Question 37

Down on the periodic table, what happens?

Answer 37

Further away from the nucleus, more energy levels (less en)

Question 38

Molecules have a certain ____ based on how the electrons repel each other

Answer 38

Shape