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

4 link electrons 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

1 link a 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

4 link Use 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

4 link Definition 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

2 link Definition 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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