parts of an atom n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Parts of an Atom PowerPoint Presentation
Download Presentation
Parts of an Atom

Loading in 2 Seconds...

play fullscreen
1 / 14

Parts of an Atom - PowerPoint PPT Presentation


  • 65 Views
  • Uploaded on

Parts of an Atom. What is an atom?. Atoms are the fundamental building blocks of all things Atoms are the most basic unit of matter Atoms contain three different types of subatomic particles. Atoms are made up of protons, neutrons, and electrons

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Parts of an Atom' - metta


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
what is an atom
What is an atom?
  • Atoms are the fundamental building blocks of all things
  • Atoms are the most basic unit of matter
  • Atoms contain three different types of subatomic particles
slide3

Atoms are made up of protons, neutrons, and electrons

  • Protons: particles with a positive charge; can be found in the nucleus
  • Neutrons: particles with no charge (a neutral charge); can be found in the nucleus
  • Electrons: particles with a negative charge that can be found orbiting the nucleus in the electron cloud
slide4

The atomic number equals the number of protons.

  • The electrons in a neutral atom equal the number of protons.
  • The mass number equals the sum of the protons and neutrons.
where are electrons found
Where are electrons found?

Electrons exist in orbitals or energy levels

2 electrons fit in the first energy level

8 electrons fit in each subsequent energy level

Carbon (C)

Helium (He)

6 neutrons

6 protons

6 electrons

2 in first level, 4 in second

2 neutrons

2 protons

2 electrons

slide6

The charge indicates the number of electrons that have been lost or gained.

  • A positive charge indicates the number of electrons (which are negatively charged) that have been lost.
  • A negative charge indicates the number of electrons that have been gained.
  • This structure can be written as part of a chemical symbol.
slide7
A chemical element is a pure substance that consists entirely of one type of atom. Elements are mapped on the periodic table.
do all atoms of the same element always have the same number of neutrons
Do all atoms of the same element always have the same number of neutrons?

Answer: NO

Atoms of the same element with differing numbers of neutrons are called isotopes

slide9

The combinations of two or more elements in definite proportions form a chemical compound.

  • Naming compounds (molecular formulae):

H20 = 2 parts hydrogen to 1 part oxygen

slide10

The physical and chemical properties of a compound are usually very different from those of the elements from which it is formed.

  • Example:
    • Sodium is a silverish metal
    • Chlorine is a greenish gas
    • Sodium Chloride (NaCl) is table salt
slide12

Ionic bonds are formed when one or more electrons are transferred from one atom to another

  • Example: Sodium Chloride (NaCl)
slide13

Covalent bonds are formed when electrons are shared between atoms

  • A molecule is the structure that results when atoms join together by covalent bonding
  • Example: Water (H2O)
van der waals forces
Van der Waals Forces
  • When molecules are close together, the oppositely charged regions are attracted to each other.
  • Van der Waals Forces are the slight forces of attraction
  • These forces explain why a gecko can climb up vertical surfaces (suction cup like forces)