# Bohr-Rutherford Diagrams - DOC by NxtkM8

VIEWS: 66 PAGES: 2

• pg 1
```									  Name: ___________________________________ Date: ________________________

Bohr-Rutherford Diagrams – Forming Ions
   In the Bohr-Rutherford model of the atom, __________________ charged
electrons orbit around a __________________ nucleus.
   The nucleus contains _________________ and ___________________, and
makes up most of the mass of the atom.
   When an atom is forming an ion, it must fill it’s ___________shell with electrons.
   Having a full valence shell makes the atom more ___________ which means they
are less ________________.

RECALL - # Protons = atomic number
# Electrons = # Protons – the charge on the atom
# neutrons = atomic mass – atomic number

19
EXAMPLE:            F
9

1. Determine the number of protons, neutrons and electrons in Fluorine.

2. Draw a Bohr-Rutherford diagram of the fluorine atom, putting protons and neutrons in
the nucleus, and electrons in the orbits. Two electrons fit in the first orbit, and eight in
the next two.

EXAMPLE:40 Ca 2+ * This atom has a charge of 2+, it is called an ION. Draw a diagram.
20

1. Did Calcium gain or lose electrons to become an ion?
Name: ___________________________________ Date: ________________________
EXAMPLE: Draw the Bohr-Rutherford diagram of the element Chlorine (Cl), and then the
ion of chlorine (Cl-).

PRACTICE:
1. Draw the following Bohr-Rutherford Diagrams, and calculate the ionic charge.

Ionic Charge = # Protons - # Electrons

Sodium (Na)                       Calcium (Ca)                 Fluorine (F)

# protons =                       # protons =                  # protons =
# electrons =                     # electrons =                # electrons =
Ionic Charge =                    Ionic Charge =               Ionic Charge =
Sodium Ion (Na1+)                 Calcium Ion (Ca2+)           Fluorine Ion (F1-)

# protons =                       # protons =                  # protons =
# electrons =                     # electrons =                # electrons =
Ionic Charge =                    Ionic Charge =               Ionic Charge =

2. What are valence electrons?

3. What are core electrons?

```
To top