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WorksheetsIB Chemistry Final Review Part 1
Total questions: 20
Worksheet time: 15mins
What errors occur in time measurements by a clock that runs too fast or slow?
Systematic errors
Random errors
Both systematic and random errors
Neither systematic nor random errors
Students worked in teams to measure the length of an object. The actual length of the object was 7.0 cm.. Select the best choice that represents their data in terms of accuracy and precision
GROUP RESULTS
5.00 cm
5.01 cm
5.02cm
4.99 cm
5.00 cm
4.99 cm
both accurate and precise
only accurate
only precise
not accurate and not precise
Which of the following is an experimental observation?
The evaporating dish was heated to 300 degrees C.
The watchglass was placed on top of the evaporating dish to prevent spillage.
Condensation formed on the watchglass as the liquid in the evaporating dish began to vaporize.
2.4 grams of NaCl was added to the dish.
Modifying a lab procedure to improve it after you perform and experiment and analyze your results reduces the future effects of:
Random errors
Systematic errors
Both random and systematic errors
Neither random or systematic errors
You mass a sample of magnesium powder to be 2.1 ± 0.1 g and mass a sample of silver nitrate to be 4.5 ± 0.1 g. Calculate the total mass of the combined mixture.
6.6 ± 0.1 g
6.6 g
6.6 ± 0.4 g
6.6 ± 0.2 g
A liquid is heated until it boils.
Which result shows that the liquid in the test-tube is pure water?
Condensation forms at the top of the test-tube.
Steam is produced.
The thermometer reads 100 °C.
There is nothing left behind in the test-tube.
A
B
C
D
The measure of the average kinetic energy of the particles of a substance is called
temperature
heat
thermal energy
kinetic theory
7.62 x 6.98 x 3.2645
The atom of an element Q has an atomic number of 27 and a mass number of 60. Which of the following statements is true about the subatomic particles of the atom of element Q?
I. Atom of element Q has 27 electrons and 60 protons
II. Atom of element Q has 27 protons and 27 electrons
III. Atom of element Q has 27 electrons and 60 neutrons
IV. Atom of element Q has 27 protons and 33 neutrons
I and IV only
II and IV only
II and III only
I and III only
The isotopes of carbon 12C and 13C:
I. have the same atomic number
II. have the same physical properties
III. have the same chemical properties
I and III only
I and II only
II and III only
I, II, and III
How many electrons are there in 35Cl1-?
17
18
35
36
The following table shows the number of subatomic particles present in five species. Which two species are isotopes of the same element?
A and B
B and C
C and D
D and E
What is correct for the shown isotope?
Protons = 29
Neutrons = 34
Electrons = 27
Protons = 29
Neutrons = 34
Electrons = 31
Protons = 34
Neutrons = 63
Electrons = 32
Protons = 34
Neutrons = 29
Electrons = 27
The naturally occurring isotopes of lithium are 6Li and 7Li. Which shows the correct approximate percentage abundances for lithium?
Lithium-6 = 75%
Lithium-7 = 25%
Lithium-6 = 50%
Lithium-7 = 50%
Lithium-6 = 35%
Lithium-7 = 65%
Lithium-6 = 10%
Lithium-7 = 90%
Which of the following species contain equal numbers of neutrons in their nuclei?
cobalt-58 and nickel-58
cobalt-58 and nickel-59
cobalt-59 and nickel-58
cobalt-58 and cobalt-59
An electron transition between energy levels n = 4 and n = 2 in an isolated atom produces a line in the visible spectrum. Which electron transition in the same atom is likely to produce a line in the UV spectrum?
from n = 4 to n = 1
from n = 4 to n = 3
from n = 3 to n = 2
from n = 5 to n = 3
A wave with a large wavelength will have...
Low Frequency & Low Energy
High Frequency & High Energy
High Frequency & Low Energy
Low Frequency & High Energy
