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1

Can molecules with polar bonds be non polar?

Yes if there is no net dipole moment

2

What is the shape of an s orbital?

spherical

3

what is the shape of p orbital?

bi-lobed

4

Which type of bonds form between atoms with small differences in electronegativity (.4-1.7)?

polar covalent bonds

5

Which type of bond forms between atoms with the same electronegativities?

non polar covalent bonds

6

What is a coordinate covalent bond?

one in which a pair of bonding electrons originates from just one of the atoms.

7

(T/F) A dipole moment exist when a molecule has a separation of positive and negative charges.

true

8

What is the formula for calculating formal charge on an atom involved in a covalent bond?

Formal charge= V-(1/2 N bonding + N nonbonding)

9

What are resonance structures?

2 or more non-identical lewis structures for the same molecules

10

(T/F) A lewis structure with small or no formal charges is preferred over one with large formula charges.

true

11

Should a negative formal charge be placed in highly electronegative atoms or weakly electronegative atoms?

highly electronegative atoms.

12

what are the bond orders of single, double, and triple bonds?

single=1st order
double=2nd order
triple=3rd order

13

(T/F) A triple bond is longer than a single bond..

False

14

What is a bond energy?

amount of energy required to separate two bonded atoms

15

Can both bonding and nonbonding electrons be valence electrons?

yes.
nonbonding e- = not involved in a bond
bonding e- = involved in a bond

16

Which type of elements contains the halogens?

group VIIA

17

Which group of elements contains alkaline earths?

group IIA

18

Which group of elements contains noble gases?

group VIIIA

19

Which groups of elements contain the transition metals?

groups IB to VIIIB

20

what is an ionic bond?

transfer of electrons between two atoms

21

what is a covalent bond?

sharing of electrons between two atoms

22

what is a polar covalent bond?

has properties of ionic and covalent bonds. electrons are shared but not equal.

23

what is a cation?

positively-charged ion

24

(T/F) Metals are found on the left side of the periodic table and are good conductors of electricity and heat.

True

25

(T/F) Non metals are found in the middle of the periodic table and are malleable, ductile and shiny.

False

26

(T/F) Metalloids are found between the metals and nonmetals and have varying properties.

True

27

Which group of elements contains the alkali metals?

Group IA

28

What is the electron affinity trend within the periodic table?

increases left to right across a period & up a group.

29

(T/F) Group VIIIA elements have high electron affinities.

False

30

What is electronegativity?

measure of attraction an atom has for the electrons in a chemical bond.