WorksheetsAssessment - 6wk1
Total questions: 20
Worksheet time: 11mins
The picture shows a model of the isotope _____?
beryllium-13
boron-9
beryllium-9
boron-8
A scientist examines a sample of an unknown metal. She isolates several atoms which contain 29 protons and 35 neutrons.
Which of the following isotopes has she isolated?
Copper-64
Gadolinium-35
Bromine-29
Chlorine-35
C-12 and C-13 are naturally-occurring isotopes of the element carbon. C-12 occurs 98.89% of the time and C-13 occurs 1.108% of the time.
What calculation should be used to determine the atomic mass of this element?
((12 x 0.1108) + (13 x .9889))/2
(12 x .9889) - (13 x 0.01108)
(12 x .9889) + (13 x 0.01108)
(12 x .9889)
Which of these conclusions can be drawn from Rutherford's experiment?
Each atom contains electrons.
The nucleus of an atom can be split.
Each atom contains protons.
Atoms are mostly empty space.
During a laboratory exercise students were asked to observe several changes to matter. They were instructed to classify these changes as either physical or chemical. Which of the following tables was completed correctly?
A sugar cube in a test tube is heated over a bunsen burner. The sugar cube turns black and has less mass than before it was heated. These changes occur because the sugar has -
reacted chemically
boiled
melted
become hydrated
The experiment above illustrates that iron and sulfur combine to form -
a nonmetal
a mixture
a compound
an alloy
Which of the following lists records the states of matter in order from most compressible to least compressible?
gas, solid, liquid
gas, liquid, solid
solid, liquid, gas
liquid, solid, gas
A clear, pure liquid sample is brought into the lab and exposed to an electrical current. Different gases are produced on each of the electrodes. The sample is -
a polymer
an element
a compound
an alloy
What does this symbol indicate?
Very Toxic
Bio hazard
Recycle
Electric
What does this symbol indicate?
Poison/Toxic
Bio Hazard
Radioactive
Corrosive
Based on his observations, the English chemist John Dalton formulated an atomic theory.
In 1897, J.J. Thomson showed that negative charges could be made to move from one end of a cathode ray tube to another, causing the tube to glow. Because of this, Thomson is credited with the discovery of the electron. Based on this information, which part of Dalton's atomic theory conflicted with Thomson's new data?
1
2
3
4
Which of the following is classified as an intensive physical property?
Number of Atoms
Kinetic Energy
Density
Moles
Which of the following samples would be expected to occupy the entire volume of its container?
CH4 (g)
CCl4 (l)
Na2CO3 (s)
CaCl2 (aq)
The picture above shows samples of aluminum in different sizes and shapes. Which sample demonstrates that aluminum is a ductile metal?
S
R
T
Q
Which scientist is known for discovery of the neutron?
Dalton
Rutherford
Planck
Chadwick
Heisenberg was responsible for which of the following?
Uncertainty Principle
Wave Theory
Stroganoff
String Theory
