Ch 2

Question 1

What are the three models of chemical bonding?

Answer 1

Ionic, covalent and metallic

Question 2

What is the name of the quantum number n?

Answer 2

principal (energy level-shell like KLMN)

Question 3

What is the name of the quantum number l?

Answer 3

subsidiary (orbitals like spdf)

Question 4

What is the name of the quantum number m_l?

Answer 4

magnetic

Question 5

What is the name of the quantum number m_s?

Answer 5

spin

Question 6

What is an atom made out of?

Answer 6

electrons, protons and neutrons

Question 7

What is atomic number?

Answer 7

of electrons of neutral species

the number of protons in nucleus of atom, or number of electrons of neutral species

Question 8

Isotope

Answer 8

element with 2 or more different atomic masses (the same
element which contain equal number of protons but different number
of neutrons)

Question 9

atomic mass unit

Answer 9

measure of atomic mass

Question 10

How many electrons in the subshell s?

Answer 10

2

Question 11

How many electrons in the subshell p?

Answer 11

6

Question 12

How many electrons in the subshell d?

Answer 12

10

Question 13

How many electrons in the subshell f?

Answer 13

14

Question 14

What is a non-directional (ionic/metallic) bond?

Answer 14

A bond where the magnitude is equal in all directions

Question 15

What kind of bond do polymers have/form?

Answer 15

covalent

Question 16

What kind of bonds do ceramics have/form?

Answer 16

ionic bonding

Question 17

What is a directional bond (covalent)?

Answer 17

The atoms prefer specific orientations in space

Question 18

What are valence electrons?

Answer 18

Those in unfilled shells

Question 19

if F_NET = F_Attract + F_Repul, what does E_Net=

Answer 19

E_NET = E_Attract + E_Repul

Question 20

Which plot shows high melting temperature and why?

Answer 20

Melting temperature (T_m) is larger if E_0 is larger and the area
under the energy-distance plot for infinite separation is larger