Ch 2: Structure of Atoms and Isotopes

Question 1

What are atoms?

Answer 1

The smallest particles of an element

Question 2

What are the subatomic particles of an atom?

Answer 2

Proton (p+)
Neutron (n)
Electron (e-)

Question 3

Where are the protons (p+) and neutrons (n) found?

Answer 3

The nucleus

Question 4

Where are the electrons (e-) found?

Answer 4

The electron cloud outside of the nucleus

Question 5

What does the atomic number (Z) represent?

Answer 5

The number of protons (p+) in an element

Question 6

What does the mass number (A) represent?

Answer 6

The number of protons (p+) and neutrons (n) in an element

Question 7

The number of protons in an element is equal to the number of:

Answer 7

Electrons (e-)

Question 8

What are isotopes?

Answer 8

Atoms of the same element with different number of neutrons

Question 9

How to calculate weighted average mass?

Answer 9

1. Find the isotope’s amu and natural abundance percentage
2. Divide the percentage by 100
3. Multiply the divided percentage by it’s amu
4. Repeat the process for the other isotopes
5. Add the sum of each isotope worked on together
6. Round final answer to the hundredth place