Chem Basics A.1 - A.6

Question 1

Proton charge and mass (u)

Answer 1

+1, 1.0073 u

Question 2

neutron charge and mass (u)

Answer 2

0, 1.0087 u

Question 3

electron charge and mass (u)

Answer 3

-1, 0.0005486 u

Question 4

atomic mass unit definition/conversion (u)

Answer 4

1/12 mass of one atom of carbon-12, 1 u = 1.6605 x 10^-24 g

Question 5

ratio nuclear radius to entire atom’s radius

Answer 5

roughly 1 : 100, 000

Question 6

atomic number

Answer 6

protons in atom’s nucleus, denoted by letter Z

Question 7

A E - isotopic notation??
z

Answer 7

A - mass number, proton + neutrons
E - element symbol
Z atomic number (# of protons)

Question 8

isotope

Answer 8

each of two or more forms same element, same # protons but differ in atomic # and # of neutrons. Some may be radioactive/unstable and occur in different proportions

Question 9

natural abundance

Answer 9

% of each isotope of a given element in naturally occuring sample

Question 10

atomic weight

Answer 10

weighted averages of masses of naturally occuring isotopes

Question 11

calculate atomic weight

Answer 11

AW = (% one isotope x mass isotope) + (% other isotope x mass isotope), can use to calculate natural abundance given AW

Question 12

organization of periodic table

Answer 12

groups: 1-18, # of valence electrons given element, need to calculate for some still
rows/periods - # electron shells

Question 13

blocks in periodic table

Answer 13

s block includes group 1-2
d block groups 3-12
p block 13-18
f block bottom seperate box

Question 14

group names

Answer 14

1 - alkali metals
2 - alkaline earth metals
15 - pnictogens
16 - chalcogens
17 - halogens
18 - noble gases
bottom block row 1 - lanthanides
bottom row 2 - actinides

Question 15

organization of subshells

Answer 15

1,2,3,4,5,6,7s
2,3,4,5,6,7p
3,4,5,6d
4,5f

electrons fill shells lowest energy levels first; 1s, 2s,2p,3s,3p,4s,3d,4p

draw shells out in a triangle, columns of s then p then d then f, numbers lining up, then squiggle line through