Periodic Table
What are the symbols for iron, bromine, gold, tungsten, oxygen, and tin?
Fe, Br, Au, W, O, and Sn
Answer the problem with the proper amount of sig figs:
125 x 9.000
1,130 or 1.13x103
How many miles will a person run during a 10 kilometer race?
(0.621 miles = 1.00 km)
6 miles
Determine the number of protons, neutrons, and electrons in the following isotope:
atomic number 53; atomic mass number 131; charge of -1
p: 53; n: 78; e: 54
Name which substances are homogeneous or heterogeneous
a) coffee b) smog c) silver spoon d) air e) blood f) rain g) soil h) honey i) medicine j) cereal
a) homogeneous b) heterogeneous c) homogeneous d) homogeneous e) heterogenous f) homogeneous g) heterogeneous h) homogeneous i) homogeneous j) heterogeneous
Label each element by what group they are in:
1) Krypton
2) Potassium
3) Chlorine
1) Noble Gas
2) Alkali Earth Metals
3) Halogens
Answer the problem with the proper amount of sig figs:
13.77 + 908.226 + 515
1,437 or 1.437x103
Complete the two unit conversions:
3779µg = ? g
1738 km = ? m
3.779 x 10-3 g
1,738,000 m
What's the symbol of the ion having 16 protons and 18 electrons?
Sulfide ion, S2-
Determine whether the following are chemical or physical changes:
a) boiling water
b) brewing coffee
c) gas combustion
d) Baking a cake
e) sublimination of dry ice
e) chemical
What are the chemical names for the symbols Xe, Rb, Mn, Co, Sr, and B?
Xenon, Rubidium, Manganese, Cobalt, Strontium, and Boron
Answer the problem with the proper amount of sig figs:
118.7/2.0 grams - 35.5 grams
24
Express a speed of 65 mi/h in SI units (m/s)
29 m/s
2963Cu
What is the atomic number and the mass number of the element listed above? How many protons, neutrons, and electrons does it have?
Atomic number: 29
Mass number: 63
p: 29; n: 34; e: 29
Four students performed an experiment to measure the density of aluminum (2.7 g/mL). Which data is accurate but not precise?
John: 2.924, 2.923, 2.925, 2.926
Sally: 2.316, 2.527, 2.941, 2.136
Megan: 2.649, 2.731, 2.695, 2.742
Mike: 2.701, 2.699, 2.702, 2.698
Megan
Ag (silver) is in ___ 11 and ___ 5, and is a part of the ___.
a) group, period, transition metals/coinage metals
b) group, period, inner transition metals/coinage metals
c) period, group, inner transition metals/coinage metals
d) period, group, transition metals
a) group, period, transition metals/coinage metals
A meter has 1000 millimeters in it. How many significant figures does this number have?
The conversion is exact. An infinite number of significant figures.
As an instructor is preparing for an experiment, he requires 225 g phosphoric acid. The only container readily available is a 150-mL Erlenmeyer flask. Is it large enough to contain the acid, the density of which is 1.83 g/mL?
Yes, because the acid's volume is will be 123 mL
Bromine has two isotopes, 79-Br and 81-Br, whose masses (78.9183 and 80.9163 amu) and abundances (50.69% and 49.31%) were determined in earlier experiments. Calculate the average atomic mass of Br based on these experiments. How does this compare to the value given on the periodic table?
79.90 amu, this value matches that on the periodic table
Indicate if the following are an intensive or extensive property.
a) density b) weight c) temperature d) boiling point e) volume f) mass g) color
a) intensive b) extensive c) intensive d) intensive e) extensive f) extensive g) intensive
What are the common charges of the following elements?
1) Ba 2) C 3) Ar 4) Ag 5) K 6) S 7) Br 8) N
1) +2 2) +4 3) 0, it's neutral
4) +1, it's an exception when it comes to transition metals
5) +1 6) -2 7) -1 8) -3
42,000; 27.0040; 150,000,000; 0.00000003500; 50,000; 0.0205
4.2 x 104; 2.70040 x 101; 1.5 x 108; 3.500 x 10-8; 5 x 104; 2.05 x 10-2
Find the mass, in pounds, of 1.00 m3 of corn syrup (density of 1.38 g/cm3).
Hint: 1 km = 2.20462 lbs
3.04 x 103 lbs
Rubidium has two isotopes: Rubidium-85 (atomic mass of 84.911 amu) and Rubidium-87 (atomic mass of 86.909 amu). The atomic weight of Rubidium is reported to be 85.47 according to the periodic table. Based on this information, which of the isotopes are more abundant?
Rubidium-85
Name which examples are qualitative or quantitative.
a) John is 5 feet 10 inches
b) Amy goes swimming three times a week
c) Sarah drives a red car
d) Jeremy has hazel eyes
e) The surface area of the painting is 150 inches
f) Identifying the anionic compounds in a molecule
a) quantitative
b) quantitative
c) qualitative
d) qualitative
e) quantitative
f) qualitative