1. How many protons does an Aluminum atom with 13 electrons have?
A. 15
B. 10
C. 13
D. 16
2. An atom has a mass number of 23 and an atomic number of 11. How many electrons are present in that atom?
A. 11
B. 12
C. 23
D. 34
3. How many protons does an atom with 34 electrons have?
A. 35
B. 36
C. 33
D. 34
4. How many protons does a hydrogen atom have?
A. 0
B. 1
C. 2
D. 3
5. What is the atomic number of an atom that contains 28 protons, 28 electrons, and 34 neutrons?
A. 28
B. 56
C. 62
D. 90