Atomic Theory And Subatomic Particles (Page 3 of 4) in pdf

Atomic Theory And Subatomic Particles Page 3

8. Create a table to compare and contrast the three subatomic particles. Include in your table the

name of the particle, the relative size of the particles (you can determine the best way to

include this – a ranking, the exact sizes, etc.), the location of the particle, and the charge of

the particle.

What is the atomic number?

Part 2: Subatomic Particles

1. The number of protons in one atom of an element determines the atom’s _________________,

and the number of electrons determines the ___________________of an element.

2. The atomic number tells you the number of ______________________in one atom of an

element. It also tells you the number of ___________________in a neutral atom of that element.

3. In order to calculate the number of neutrons you must subtract the __________________from

the ______________________.

4. Give the symbol and number of protons in one atom of:

a. Lithium

b. Iron

c. Oxygen

d. Krypton

e. Helium

f. Bromine

5. Give the symbol and number of protons and electrons in a neutral atom of:

Uranium

______

Protons_______

Electrons_______

Boron

______

Protons_______

Electrons_______

Antimony

______

Protons_______

Electrons_______

6. Name the element that has the following numbers of subatomic particles:

a. 26 electrons, 29 neutrons, 26 protons

d. 53 protons, 74 neutrons

b. 2 electrons (neutral atom)

e. 20 protons

c. 15 protons

7. If you know only the following information can you always determine what the element is? If

the answer is 'No' explain why not.

a. number of protons

c. number of neutrons

b. number of electrons in a neutral atom

d. number of electrons

8. What are isotopes? Give an example.

9. Identify the following pairs of elements as isotopes or different elements.

a. Element A has 42 protons and 50 neutrons Element B has 42 protons and 51 neutrons

b. Element X has 54 protons and a mass number of 124 Element Z has 54 protons and a mass

number of 130

c. Element C has 38 neutrons and an atomic number of 22 Element D has 38 neutrons and an

atomic number of 23

Complete Isotope Table on Chapter 3 Worksheet!

Atomic Theory And Subatomic Particles Page 3

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