Review Questions
If xenon has an atomic number of 54 and a mass number of 108, how many neutrons does it have?
- 54
- 27
- 100
- 108
Hint:
A
Atoms that vary in the number of neutrons found in their nuclei are called ________.
- ions
- neutrons
- neutral atoms
- isotopes
Hint:
D
Potassium has an atomic number of 19. What is its electron configuration?
- shells 1 and 2 are full, and shell 3 has nine electrons
- shells 1, 2 and 3 are full and shell 4 has three electrons
- shells 1, 2 and 3 are full and shell 4 has one electron
- shells 1, 2 and 3 are full and no other electrons are present
Hint:
C
Which type of bond represents a weak chemical bond?
- hydrogen bond
- atomic bond
- covalent bond
- nonpolar covalent bond
Hint:
A