Chapter 11 - Heat and Thermodynamics - 10

Chapter 11 - Heat and Thermodynamics - 10

1. If an element has atomic number 17 and mass number 35. How many neutrons are present in its nucleus?

a) 17
b) 35
c) 25
d) 18

2. Who contributed to the quantitative information about atomic masses?

a) Dalton
b) Gay
c) all of these
d) Avogadro

3. Which one of the following isotopes has been chosen as standard by the international agreement?

a) Cl-35
b) C-12
c) C-13
d) C-14

4. The mass of an atom of an element relative to the mass of an atom of C-12 is called as?

a) atomic mass
b) relative atomic number
c) mass number
d) relative atomic mass

5. When did C-12 has been chosen as standard by the international agreement?

a) 1861
b) 2000
c) 1961
d) 1971

6. The device which has been used to determine the acurate atomic mass of C-12 is known as?

a) stethoscope
b) mass spectrometer
c) micrometer
d) thermometer

7. A mass exactly equal to one-twelfth the mass of one C-12 is known as?

a) oneamu
b) one meter
c) one ampere
d) one kelvin

8. The unit of atomic mass is known as?

a) pascal
b) amu
c) meter
d) kelvin

9. Mass of one C-12 atom is?

a) 14 amu
b) 6 amu
c) 8 amu
d) 12 amu

10. A hydrogen atom is 8.40% as massive as the standard C-12 atom. The relative atomic mass of hydrogen is?

a) 1.008 amu
b) 8.40 amu
c) 12 amu
d) 1.08 amu

This is more feedback!

This is the feedback!