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Question 1 of 10
1. Question
In relation to atomic structure, when are atoms the most stable?
Correct
Atoms are most stable when they complete an orbit around the nucleus.
Incorrect
Atoms are most stable when they complete an orbit around the nucleus.
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Question 2 of 10
2. Question
Which of the following statement best describes ground-state atoms?
Correct
An equal number of protons and electrons comprise the ground state atoms making them electrically neutral.
Incorrect
An equal number of protons and electrons comprise the ground state atoms making them electrically neutral.
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Question 3 of 10
3. Question
What happens to atoms during an ionic state?
Correct
Atoms will lose electrons and cation or positive net charge and anion or negative net charge are the result.
Incorrect
Atoms will lose electrons and cation or positive net charge and anion or negative net charge are the result.
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Question 4 of 10
4. Question
Which of the following best describe isotopes?
Correct
Isotopes are the same atom of different kinds which may vary in weight.
Incorrect
Isotopes are the same atom of different kinds which may vary in weight.
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Question 5 of 10
5. Question
Which of the following best defines The Law of Conservation of Mass?
Correct
It states that during a chemical reaction, matter is not created or destroyed. It only simply rearranged.
Incorrect
It states that during a chemical reaction, matter is not created or destroyed. It only simply rearranged.
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Question 6 of 10
6. Question
Which of the following statement(s) is not true about equilibrium?
I. It is a reaction that stops before all reactants are consumed to make products.
II. It is a state in which products are formed by the reactants at the same rate reactants form products.
III. It is a reaction that manipulates the balance and increase of reaction rate.
IV. It is a reaction that can be reversed.Correct
Option III provides a false statement. Equilibrium does not manipulate the balance and increase of reaction rate, rather the control by various means, a change in equilibrium, or reversibility, the and rate of the reaction.
Incorrect
Option III provides a false statement. Equilibrium does not manipulate the balance and increase of reaction rate, rather the control by various means, a change in equilibrium, or reversibility, the and rate of the reaction.
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Question 7 of 10
7. Question
What happens to particles when temperature rises?
Correct
When there is an increase in temperature, the particles move around faster the temperature increases.
Incorrect
When there is an increase in temperature, the particles move around faster the temperature increases.
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Question 8 of 10
8. Question
Below are false statements about catalysts except one. Which statement about catalysts is true?
Correct
Catalysts are not used up and can be collected after the reaction. They are collected upon completion when it is not used up, acts as an accelerator for reactions by decreasing energy activation needed for a reaction to occur.
Incorrect
Catalysts are not used up and can be collected after the reaction. They are collected upon completion when it is not used up, acts as an accelerator for reactions by decreasing energy activation needed for a reaction to occur.
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Question 9 of 10
9. Question
Which statement about concentration is false?
Correct
Increased concentration produces more products because more reactants can cause more collisions.
Incorrect
Increased concentration produces more products because more reactants can cause more collisions.
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Question 10 of 10
10. Question
Which of the following statement(s) best describe why dispersion forces is considered the weakest intermolecular force?
I. Because the electrons are shared equally making the bond nonpolar.
II. Because the electrons of an element or compound attract each other on one side of an atom only.
III. Because the electron pairs are shared unequally.
IV. Because the higher electropositive end of a molecule is attracted to the electronegative end.Correct
When electrons of an element or compound attract each other on one side of an atom only, it causes a momentary dipole. The higher electropositive end of a molecule is attracted the electronegative end is only 1% strong compared to a normal covalent bond.
Incorrect
When electrons of an element or compound attract each other on one side of an atom only, it causes a momentary dipole. The higher electropositive end of a molecule is attracted the electronegative end is only 1% strong compared to a normal covalent bond.