C2.1-E4 : Protons, Neutrons, Electrons and Isotopes

DIY MULTIPLE CHOICES  : Protons, Neutrons, Electrons and Isotopes

Exercises : 

1. Identify the number of protons, electrons, and neutrons in the following atom.

 

2. Identify the subatomic particles (protons, electrons, neutrons, and positrons) present in the following:

• 146C

• 35Cl−
  

• 24Mg2+

• 60Co

• 3H

• 40Ar

3. Given the following, identify the subatomic particles present. (The periodic table is required to solve these problems)

• Charge +1, 3 protons, mass number 6.
• Charge -2, 7 neutrons, mass number 17.
• 26 protons, 20 neutrons.
• 28 protons, mass number 62.
• 5 electrons, mass number 10.
• Charge -1, 18 electrons, mass number 36.

4. Fill in the rest of the table:

Atomic Number	Mass Number	Number of Protons	Number of Neutrons	Number of Electrons
2			2
	23			11
		15	16
	85	37
53			74

5.In the following chart, determine the number of protons, neutrons and electrons for each particular isotope. If the protons, neutrons and electrons are given, write the symbol for the isotope. (You may wish to print this page or just write your answers on a piece of paper.) 

Isotope	Protons	Neutrons	Electrons
16O
17O
137Ba
14C
	24	28	24
	9	10	9
	53	77	53
	6	7	6

6. Complete the following table