August 2015  Chemistry Regents #31-35

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31 Which conclusion was drawn from the results of the gold foil experiment?

(1) An atom is electrically neutral.

(2) An atom is mostly empty space.

(3) The nucleus of an atom is negatively charged.

(4) The electrons in an atom are located in specific shells.

2 link empty space, positive nucleus
32 Which electron configuration represents an atom of magnesium in an excited state?

(1) 2𤪙      (3) 2𤾄

(2) 2𤪜      (4) 2𤾇

1 link need 12 electrons and one is in a higher energy level than the configuration on the PT
33 Which group on the Periodic Table has elements with atoms that tend not to bond with atoms of other elements?

(1) Group 1       (3) Group 17

(2) Group 2       (4) Group 18

4 link Noble Gases

 

34 Which group on the Periodic Table has at least one element in each of the three phases of matter at STP?

(1) 1      (3) 17

(2) 2      (4) 18

3 link group 17

Gases F2 and Cl2

Liquid  Br2

Solid  I2

35 Rubidium and cesium have similar chemical properties because, in the ground state, the atoms of both elements each have

(1) one electron in the outermost shell

(2) two electrons in the outermost shell

(3) one neutron in the nucleus

(4) two neutrons in the nucleus

1 link reactivity is based on valence electrons

 

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 51-54 Questions 55-57 Questions 58-59 Questions 60-61 Questions 62-65 Questions 66-68 Questions 69-72 Questions 73-74  Questions 75-76  Questions 77-78  Questions 79-80  Questions 81-82  Questions 83-85

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