June 2015 Chemistry Regents #1-5

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1. Compared to an electron, which particle has a charge that is equal in magnitude but opposite in sign?

(1) an alpha particle       (2) a neutron

(3) a beta particle          (4) a proton

4linkelectrons are negative and protons are the opposite
2. The mass of a proton is approximately equal to

(1) 1 atomic mass unit

(2) 12 atomic mass units

(3) the mass of one mole of carbon atoms

(4) the mass of 12 moles of carbon atoms

1linka protons has a mass of 1 amu
3. Which property decreases when the elements in Group 17 are considered in order of increasing atomic number?

(1) atomic mass        (3) melting point

(2) atomic radius      (4) electronegativity

4linkUse Table S

 

4. Any substance composed of two or more elements that are chemically combined in a fixed proportion is

(1) an isomer            (3) a solution

(2) an isotope          (4) a compound

4linkDefinition of a compound
5. Which term refers to how strongly an atom of an element attracts electrons in a chemical bond with an atom of a different element?

(1) entropy

(2) electronegativity

(3) activation energy

(4) first ionization energy

2linkDefinition of electronegativity

 

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 51-53 Questions 54-56 Questions 57-59 Questions 60-61 Questions 62-65 Questions 66-68 Questions 69-72 Questions 73-75  Questions 76-79  Questions 80-82  Questions 83-85

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