June 2024 Chemistry Regents #1-5

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Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51-52 Questions 53-55 Questions 56-58 Questions 59-60 Questions 61-62 Questions 63-65 Questions 66-69 Questions 70-73 Questions 74-77 Questions 78-81 Questions 82-85 

 

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Questions

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Explanations
1.Which description of the atom is based on the results of the gold foil experiment in the early 1900s?

1 Atoms are small, dense, indivisible spheres.
2 Atoms are composed of protons, electrons, and neutrons.
3 Atoms have small, dense, positively charged nuclei.
4 Atoms have electrons with wavelike properties.		 3   Rutherford's gold foil experiment

atoms have a positive nucleus, mostly empty space
2. According to the electron cloud model, which term is defined as the most probable location of an electron in an atom?

1 Configuration
2 Nucleus
3 Orbital
4 Spectrum
 		 3   orbitals- where electron live
3. Which change occurs when an electron returns from a higher energy state to a lower energy state?

1 An ionic compound is formed, and energy is emitted.
2 An ionic compound is formed, and energy is absorbed.
3 A specific amount of energy is absorbed.
4 A specific amount of energy is emitted.
 		 4   electron loses potential energy

 

4. Which phrase describes the different isotopes of an element?

1 Same number of electrons and a different number of protons.
2 Same number of protons and a different number of electrons.
3 Same number of protons and a different number of neutrons.
4 Same number of neutrons and a different number of protons.
 

 3   definition of a isotope- on every regents

Same number of protons and a different number of neutrons.
5. Which statement describes a chemical property of sodium?

1 It is silver in color.
2 It has a density of 0.97 g/cm³ at room temperature.
3 It has atoms with an atomic radius of 160 pm.
4 It is highly reactive with water.

 4   Chemical- changes the substance into something different

 

Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51-52 Questions 53-55 Questions 56-58 Questions 59-60 Questions 61-62 Questions 63-65 Questions 66-69 Questions 70-73 Questions 74-77 Questions 78-81 Questions 82-85  

   

 

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