Name____________________
Block____________________
Chemistry Test 1
I.
Put the following values in scientific notation
1) 420.0_______________________
3) 0.00548________________________
2) 719,000_____________________
4) 0.0074______________________
List the number of Significant figures;
1)_______ 3.3300 2)________ .0045 3) ________205,000
II.
Fill in the table below.
Location
Mass
Charge
Neutrons
Protons
Electrons
III.
Find the number of protons, neutrons and electrons in the following.
1) P________ N________E___________ 2) P_______ N_______ E_________3)P______ N______ E______
15
P
30.97
13
AL
Al
3+
26.98
IV.
Problems. ( You must show your work for credit)
1) Find the density of an irregular object that has a mass of 54.3 g and makes the water in a graduated cylinder
rise from 22 ml to 41.5 ml.
1)
2) Find the density of a rectangular solid that has a length of 5.4 cm and a width of 2.3 cm and a height of 4.7
cm and has a mass of 107.3 g.
2)
3) A block of wood has a density of 8.8 g/ml . What is the density of 1/4 of the block of wood?
3)
4) You deliver newspapers in a neighborhood for 5 cents a flyer. If there are 24 houses per block and you can
work 6 blocks in an hour, how much money could you earn in 14 hours?
4)
5) My son could crawl 0.6 meters in a minute I had to wash his pants every 3 hours. How many ttimes would I
need to wash his pants if her crawled for 25 meters?
5)
6) Element X has two natural isotopes. The isotope with a mas number of 10 is 20% abundant, The isotope
with a mass number of 11 and is 80$ abundant. What is the average atomic mass and what is the element?
6)