CHEM 120 unit 1 Exam Questions and Correct
Answers| Latest 2025
How many neutrons are in a neutral atom of Zn if it has 30 electrons and a mass number
of 65? - ✔✔35
What is the atomic number of an element with 19 protons and 20 neutrons? - ✔✔19
What is the mass number of an element with 20 electrons and 22 neutrons? - ✔✔42
How many neutrons are in a neutral atom of Cr (atomic number 24) if it has a mass
number of 52? - ✔✔28
How many electrons are in a neutral atom of Na (atomic number 11) which has 12
neutrons? - ✔✔11
How many protons in a neutral atom of Cu (atomic number 29) if it has 35 neutrons? -
✔✔29
How many protons are in a neutral atom of C (atomic number 6) which has a mass
number of 14? - ✔✔6
What is the mass number of a neutral atom of Ag (atomic number 47) if it has 60
neutrons? - ✔✔107
How many protons in a neutral atom of Fe (atomic number 26) with a mass number of
55? - ✔✔26
, How many electrons in a neutral atom of Au (atomic number 79) if it has 120 neutrons?
- ✔✔79
Give the electron arrangement for C (atomic number 6 - ✔✔2,4,0,0
Give the electron arrangement for Mg (atomic number 12) - ✔✔2,8,2,0
Give the electron arrangement for P (atomic number 15) - ✔✔2,8,5,0
Give the electron arrangement for Li (atomic number 3) - ✔✔2,1,0,0
Give the electron arrangement for Al (atomic number 13) - ✔✔2,8,3,0
Give the electron arrangement for Ar (atomic number 18) - ✔✔2,8,8,0
Give the electron arrangement for N (atomic number 7) - ✔✔2,5,0,0
Give the electron arrangement for F (atomic number 9) - ✔✔2,7,0,0
Give the electron arrangement for He (atomic number 2) - ✔✔2,0,0,0
Give the electron arrangement for Na (atomic number 11) - ✔✔2,8,1,0
Answers| Latest 2025
How many neutrons are in a neutral atom of Zn if it has 30 electrons and a mass number
of 65? - ✔✔35
What is the atomic number of an element with 19 protons and 20 neutrons? - ✔✔19
What is the mass number of an element with 20 electrons and 22 neutrons? - ✔✔42
How many neutrons are in a neutral atom of Cr (atomic number 24) if it has a mass
number of 52? - ✔✔28
How many electrons are in a neutral atom of Na (atomic number 11) which has 12
neutrons? - ✔✔11
How many protons in a neutral atom of Cu (atomic number 29) if it has 35 neutrons? -
✔✔29
How many protons are in a neutral atom of C (atomic number 6) which has a mass
number of 14? - ✔✔6
What is the mass number of a neutral atom of Ag (atomic number 47) if it has 60
neutrons? - ✔✔107
How many protons in a neutral atom of Fe (atomic number 26) with a mass number of
55? - ✔✔26
, How many electrons in a neutral atom of Au (atomic number 79) if it has 120 neutrons?
- ✔✔79
Give the electron arrangement for C (atomic number 6 - ✔✔2,4,0,0
Give the electron arrangement for Mg (atomic number 12) - ✔✔2,8,2,0
Give the electron arrangement for P (atomic number 15) - ✔✔2,8,5,0
Give the electron arrangement for Li (atomic number 3) - ✔✔2,1,0,0
Give the electron arrangement for Al (atomic number 13) - ✔✔2,8,3,0
Give the electron arrangement for Ar (atomic number 18) - ✔✔2,8,8,0
Give the electron arrangement for N (atomic number 7) - ✔✔2,5,0,0
Give the electron arrangement for F (atomic number 9) - ✔✔2,7,0,0
Give the electron arrangement for He (atomic number 2) - ✔✔2,0,0,0
Give the electron arrangement for Na (atomic number 11) - ✔✔2,8,1,0
