atomic structure - chemistry in earth systems · 2020. 3. 11. · how to find the number of...

Atomic StructureCarolina Robles & Alexis Garcia

The Periodic Table helps us determine many things about the Atomic Structure of an Atom

Let’s take a look at the element Sulfur for example:

Where the Atomic Number of an Element is located

Atomic Number

How to find the atomic mass of an Element:

How to find the atomic mass of an Element:

Atomic Mass

How to find the number of protons, electrons, and neutrons:

Protons

Number of Protons

The number of protons an element has, is the same as the atomic number.

To find the number of electrons subtract the atomic number from the atomic mass. So for Sulfur you would subtract 16 from 32. The number of electrons is 16.

Electrons

Neutrons

To find the number of neutrons is the same as finding the number of electrons. You would subtract 16 from 32. So the number of neutrons is 16.

Bohr ModelTo draw the bohr model for

oxygen you place the number of

protons and neutrons in the

nucleus.

Then you place the electrons in

the shells , The first shell can

contain up to 2 electrons the

second shell can contain up to 8

electrons.

How are Elements represented in Isotope Notation?

How to find how the number of valence electrons an element has:

Quiz

1. Where is the atomic number located?

Atomic Number

2. What is the Atomic Mass of Sulfur?

Atomic Mass

3. How many electrons does carbon have?

Carbon has 6 electrons.

When you subtract the atomic number which is 6

from the atomic mass which is 2 you get 6 electron.

4. What is an Isotope?

4. What is an Isotope?

An isotope is the same element of which contain the same

number of protons but different number of neutrons.

5. How many valence electrons does the element Chlorine have?

The element, Chlorine, has 7 valance electrons.