August 2015 Chemistry Regents #1-5

Highlight to reveal answers and explanations

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

 Other Regents Exams

 

Questions

Answer Links

Explanations

1 Which subatomic particles are paired with their charges?

(1) electron–positive, neutron–negative, proton–neutral

(2) electron–negative, neutron–neutral, proton–positive

(3) electron–negative, neutron–positive, proton–neutral

(4) electron–neutral, neutron–positive, proton–negative

2 link electron–negative, neutron–neutral, proton–positive

just know it

2 In the ground state, an atom of which element has two valence electrons?

(1) Cr    (3) Ni

(2) Cu    (4) Se

3 link last number in an electron configuration
3 The atoms in a sample of an element are in excited states. A bright-line spectrum is produced when these atoms

(1) absorb energy      (3) emit energy

(2) absorb positrons  (4) emit positrons

3 Link electrons fall (higher to lower) releasing energy in the form of light

 

4 Which statement describes a concept included in the wave-mechanical model of the atom?

(1) Positrons are located in shells outside the nucleus.

(2) Neutrons are located in shells outside the nucleus.

(3) Protons are located in orbitals outside the nucleus.

(4) Electrons are located in orbitals outside the nucleus.

4  

link

electrons travel in waves
5 All elements on the modern Periodic Table are arranged in order of increasing

(1) atomic mass

(2) molar mass

(3) number of neutrons per atom

(4) number of protons per atom

4 link protons=atomic number

 

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

Back to Regents Exams