Chemistry Semester 1 Review

unit one

100

convert 850 milliliters to liters

0.85 liters

200

how many significant figures are in 5.03

3 significant figures 

300

physical or chemical change: you crack an egg, mix it up, and cook it in a frying pan

chemical change

400

convert 2.3 x 10⁸ to a standard decimal number

230000000

500

convert 0.0000457 to scientific notation

4.57 x 10^-5

unit two

100

what are the 3 subatomic particles and their charges

protons (+), electrons (-), neutrons (none)

200

what is the periodic trend of atomic radius

moving a cross a row decrease, moving down increases

300

noble gas electron configuration of calcium

[Ar] 4s²

400

a sample decays from 40g to 5g in 75 days. What is its half-life?

25

500

The half-life of Carbon-14 is 5700 years. If you start with 100 grams of carbon-14, how much will you have after 11400 years?

25g

unit three

100

what type of element gives up electrons, making the ions positively charged

metals

200

how do you name a non-metal ion?

add -ide usually at the second vowel

300

name the covalent bond: CCl₄

carbon tetrachloride

400

write the formula for the ionic compound: magnesium oxide

Mg₂O₂

500

write the formula for the covalent compound: diboron tetrahydride

B₂H₄