ACS CHEMISTRY GENERAL EXAM
Questions with Correct Answers
Pass the Exam, 100% Verified
1. Layout of an element (mass # & atomic #)
2. atomic number =
Answer> # of protons
3. mass number =
Answer> # of protons + neutrons
4. the number of protons in a neutral atom will equal the
Answer> # of electrons
5. how to find the correct number of neutrons
Answer> mass number - atomic number
6. Forms of the same elements that differ in amount of neutrons
Answer> isotopes
7. What particle, if lost from the nucleus, would NOT cause a change in the atomic
number?
,Answer> a neutron because it has no charge
8. When alpha particles were shot at a metal foil target, most passed through without
deflections, while others deflected at large angles. What did this suggest to Rutherford?
Answer> that the atoms of the metal were mostly empty space, while the nucleus
consisted of most of the mass which included highly condensed positive particles (which
caused the deflection).
9. An atom has a valence shell configuration of 1s1. To which group of ele- ments on
the periodic table does it belong?
Answer> IA
alkali metals
10. electromagnetic spectrum
Answer>
11. The greater the wavelength of a photon..?
Answer> the lower its frequency
12. The greater the frequency of a photon...?
Answer> the shorter its wavelength
13. Light energy formula
Answer>
,14. What does C in the light energy formula represent?
Answer>
15. Give the ground-state electron configuration of an atom in the second period
Answer> 1s2 2s1
16. Electrons configuration rule that states electrons do not pair until they have to.
(put one electrons in each electron domain then pair up)
Answer> Hund's rule
17. An experimental phenomena associated with atoms having unpaired elec- trons -
which states such substances are attracted to magnetic fields
Answer> Para- magnetism
18. Which drop in energy level results in the greatest emission of energy?
Answer> n=2 to n=1
19. quantum numbers
Answer>
20. What do the 4 quantum numbers stand for?
Answer> n = energy level l = (n-1)
ml -l to l
mn 1/2 or -1/2 (spin)
, 21. List the quantum numbers for the s, p, d, and f orbitals
Answer> s 1,0,0 p 2, 1, -1-0-1
d 3, 2, -2--1-0-1-2
f 4, 3 -3--2--1-0-1-2-3
Questions with Correct Answers
Pass the Exam, 100% Verified
1. Layout of an element (mass # & atomic #)
2. atomic number =
Answer> # of protons
3. mass number =
Answer> # of protons + neutrons
4. the number of protons in a neutral atom will equal the
Answer> # of electrons
5. how to find the correct number of neutrons
Answer> mass number - atomic number
6. Forms of the same elements that differ in amount of neutrons
Answer> isotopes
7. What particle, if lost from the nucleus, would NOT cause a change in the atomic
number?
,Answer> a neutron because it has no charge
8. When alpha particles were shot at a metal foil target, most passed through without
deflections, while others deflected at large angles. What did this suggest to Rutherford?
Answer> that the atoms of the metal were mostly empty space, while the nucleus
consisted of most of the mass which included highly condensed positive particles (which
caused the deflection).
9. An atom has a valence shell configuration of 1s1. To which group of ele- ments on
the periodic table does it belong?
Answer> IA
alkali metals
10. electromagnetic spectrum
Answer>
11. The greater the wavelength of a photon..?
Answer> the lower its frequency
12. The greater the frequency of a photon...?
Answer> the shorter its wavelength
13. Light energy formula
Answer>
,14. What does C in the light energy formula represent?
Answer>
15. Give the ground-state electron configuration of an atom in the second period
Answer> 1s2 2s1
16. Electrons configuration rule that states electrons do not pair until they have to.
(put one electrons in each electron domain then pair up)
Answer> Hund's rule
17. An experimental phenomena associated with atoms having unpaired elec- trons -
which states such substances are attracted to magnetic fields
Answer> Para- magnetism
18. Which drop in energy level results in the greatest emission of energy?
Answer> n=2 to n=1
19. quantum numbers
Answer>
20. What do the 4 quantum numbers stand for?
Answer> n = energy level l = (n-1)
ml -l to l
mn 1/2 or -1/2 (spin)
, 21. List the quantum numbers for the s, p, d, and f orbitals
Answer> s 1,0,0 p 2, 1, -1-0-1
d 3, 2, -2--1-0-1-2
f 4, 3 -3--2--1-0-1-2-3
