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WorksheetsFirst Semester Exam Review
Total questions: 17
Worksheet time: 17mins
Silicon is an element that has metallic shininess, has a good heat conductivity, and is not brittle. Silicon is most likely a
compound.
metalloid.
nonmetal.
metal.
Which of the following is true for covalent bonding?
Electrons are shared
Oxidation numbers are always negative
Electrons are transferred
Particles are always positively charged
A mass of gas is enclosed in a rigid container. What will occur if the velocity of the gas molecules colliding with the sides of the container increases?
The density of the gas will increase
The pressure of the gas will increase
The pressure of the gas will decrease
The density of the gas will increase
Which of the following BEST describes what happens in a fusion reaction?
A single nucleus divides into two or more nuclei and gives off energy
Electrons are shared between the nuclei
Two low mass nuclei are joined to form one nucleus and gives off energy
A chemical reaction occurs between the nuclei
A neutral atom of which element contains 10 electrons?
Neon
Boron
Fluorine
Lithium
Which two elements have the most similar chemical properties?
Cl and Ar
Na and P
Ca and Br
Be and Mg
Look at the following chemical equation:
2H2O --> 2H20 + O2
Does this equation follow the conservation of mass?
Yes, because the mass of the reactants is greater than the mass of the products.
No, because the mass of the reactants is less than the mass of the products.
No, because the coefficient of the reactant is less than the coefficient sum of the products.
Yes, because each atom that is in the reactants is found in the products.
Which pH value indicates a basic solution?
1
12
5
7
How does the molecular motion of a substance change when it goes from liquid to solid?
The molecules gain energy,
The molecules lose energy, and their relative motion decreases.
The molecules lose energy, and their relative motion increases.
The molecules energy stays constant, and there is no change in motion.
An atom of an element contains 6 protons, 6 neutrons, and 6 electrons. An atom that is a different isotope of this element would contain:
7 protons, 6 neutrons, and 6 electrons
6 protons, 6 neutrons, and 7 electrons
6 protons, 7 neutrons, and 6 electrons
7 protons, 7 neutrons, and 7 electrons
Which type of energy is associated with the random motion of the particles in a sample of gas?
Nuclear energy
Potential energy
Thermal energy (kinetic energy + potential energy)
Chemical energy
The red cabbage indicator turns blue in a base. A liquid with which pH would turn the indicator pink?
9
13
5
7
Which statement BEST describes what happens in a fission reaction?
Heavy nuclei split into lighter nuclei
Energy is released, and less stable elements are formed.
Light nuclei form into heavier nuclei.
Energy is absorbed, and less stable nuclei are formed.
Unknown elements W and X formed the compound W3X during a reaction. If element W has one valence electron, element X MOST LIKELY has how many valence electrons?
5
7
3
1
Which of the following is NOT a way to increase the solubility of a solid in water?
Crushing the solid
Shaking the mixture and water
Raising the temperature of the water
Letting the mixture stand still for a long time
Which of the following combinations would create the fastest chemical reactions?
A crushed antacid table and vinegar at 25 degrees Celsius
A crushed antacid tablet and vinegar at 50 degrees Celsius
A whole antacid tablet and vinegar at 25 degrees Celsius
A whole antacid tablet and vinegar at 50 degrees Celsius
Which of the following is a base?
HNO3
NaOH
HCl
H2SO4
