Question

practice problems:

1. lithium has an atomic mass of 7 and an atomic number of 3. how many neutrons does it have?

p. answer:

1. fluorine has 9 protons and an atomic mass of 19. how many neutrons does it have?

e. answer:

part 4: reflection questions

1. where is the location of an atoms protons?

a. answer:

1. where is the location of an atoms electrons?

Explanation:

Step1: Recall neutron calculation rule

Neutron count = Atomic mass - Atomic number (or proton count)

Step2: Solve for Lithium

Atomic mass = 7, Atomic number = 3
$\text{Neutrons} = 7 - 3 = 4$

Step3: Solve for Fluorine

Atomic mass = 19, Proton count = 9
$\text{Neutrons} = 19 - 9 = 10$

Step4: Locate protons in atom

Protons reside in the atom's central core.

Step5: Locate electrons in atom

Electrons orbit outside the central core.

Answer:

1. 4
2. 10

Part 4:

1. In the atom's nucleus (central core)
2. In electron shells/orbitals surrounding the nucleus