Midterm 1

Question 1

nano

Answer 1

1 X 10^-9

Question 2

micro

Answer 2

1 X 10^-6

Question 3

mili

Answer 3

1 X 10^-3

Question 4

centi

Answer 4

1 X 10^-2

Question 5

deci

Answer 5

1 X 10^-1

Question 6

kilo

Answer 6

1 X 10^3

Question 7

density =

Answer 7

D = mass / volume

Question 8

molar mass =

Answer 8

molar mass = mass / moles

Question 9

isoelectronic

Answer 9

-having the same electron configuration

Question 10

electron affinity

Answer 10

• ability to hold electrons

- increases up and right

Question 11

ionization energy

Answer 11

• energy required to remove an electron

- increases up and right

Question 12

electronegativity

Answer 12

• ability to pull on electron

- increases up and right

Question 13

atomic radius

Answer 13

• size of an atom

- increases down and left

Question 14

Z =

Answer 14

-Z is number of protons in the specified atom

Question 15

ion

Answer 15

atom with charge (Al^+3 instead of Al)

Question 16

mass number

Answer 16

• protons + neutrons

- number under atom in box on periodic table

Question 17

atomic number

Answer 17

• number of protons

- on top of atom box in periodic table

Question 18

What type of electron transition in an atom results in the highest energy emitted?

Answer 18

• fall from large to small number (ex. 5 -> 2)

- highest energy is emitted when fall is greater (bc loses energy going up, bc takes energy to go up)

Question 19

energy = (using frequency)

Answer 19

e = hv

-h is a constant on ws

Question 20

exception for Cr and Mo

Answer 20

• move one electron from highest S to highest d

- d needs to be half full (5)

Question 21

exception for Cu, Ag, Au

Answer 21

• move one electron from highest S to highest d

- d needs to be full (10)

Question 22

coordinates for potential set of quantum numbers

Answer 22

1. number next to letter of circled electron (5 in 5s)
2. s=0, p=1, d=2, f=3
3. prob 0? (-1 for 2 bubbles)
4. +1/2 if arrow is up, -1/2 if arrow is down

Question 23

when does shielding increase

Answer 23

-shielding increases as it goes down periodic table

Question 24

which has higher ionization energy? nitrogen or oxygen

Answer 24

• nitrogen is an exception

- bc lower electron-electron repulsion