Pre Prep

Question 1

What two transition metals have a fixed charge

Answer 1

Zn +2

Ag +1

Question 2

What two transition metals have a possible of being +2 or +4

Answer 2

Sn

Pb

Question 3

A Cation has a what charge

Answer 3

Positive

Question 4

A Anion has a what charge

Answer 4

Negative

Question 5

What are isotopes

Answer 5

Same number of protons

Different number of neutrons

Question 6

Rules of sig fig (5)

Answer 6

1. All none zero digits are significant
2. Interior zeros are significant e.g. 1.05
3. Trailing zeros after a decimal place are significant e.g. 1.050
4. Leading zeros are NOT significant
5. Zeros at the end of a number without decimal place are put into scientific notation

Question 7

X and / you look for the lowest

Answer 7

number of sig figs

Question 8

+ and - you look for the lowest

Answer 8

number of decimal places

Question 9

What is the rules of rounding

Answer 9

1 - 4 = round down
6 - 9 = round up
5 = look at number before 5:
IF ITS EVEN = ROUND DOWN
IF ITS ODD = ROUND UP

Question 10

What is special about Exact numbers

Answer 10

You dont consider them sig figs

Question 11

What are the rules of graphs

Answer 11

1. Title = descriptive
2. Units on x and y and label
3. Never connect dots = draw line of best fit
4. 80% of the space used = you dont have to start from zero

Question 12

What is avogadro’s number

Answer 12

6.02 x 10^23

Question 13

Going from grams to moles you use

Answer 13

Molecular weight

Question 14

Going from moles to molecules/atoms you use

Answer 14

avogadro number