atoms1Opt

atoms1Opt - 100s of free ppts from www.pptpoint.com library...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
The Building Blocks Matter is made up of atoms. The structure of atoms dictate their properties. How atoms combine dictate what we see in the many minerals in nature. New technologies allow us to peer ever closer at the minute structures of minerals, down to the scale of individual atoms. 100’s of free ppt’s from www.pptpoint.com library
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The Stuff That Makes Atoms Although one can subdivide atoms into numerous subatomic particles , we will be concerned only with protons, neutrons and electrons . Protons and neutrons are together in the nucleus of an atom, whereas electrons are in motion in orbits around the central nucleus. Protons carry a positive electrical charge, electrons carry a negative charge, and neutrons carry no charge. Neutrons work to keep nuclei together. Most atoms are electrically neutral, meaning that they have an equal number of protons and electrons.
Background image of page 2
Maintaining Neutrality Most atoms are electrically neutral, meaning that they have an equal number of protons and electrons. A schematic model of a lithium (Li) atom in the ground state. It has 3 protons in the nucleus, and 3 electrons in orbit. (we will get to the number of neutrons)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Electronic and Nuclear Properties Properties of atoms reflect some combination of features related to electrons or to the nucleus. The electronic properties are those related to how atoms connect to one another: bonding. The nuclear properties include features like radioactivity.
Background image of page 4
Size of Nuclei The number of neutrons tends to closely follow the number of protons. Atoms with more of each are bigger and heavier. A uranium atom, with 92 protons and ~146 neutrons is gigantic compared to dinky helium (2 + 2).
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Microcosms of our solar system, atoms are dominantly empty space: If an oxygen atom had a total radius of 100 km, the nucleus would be a ~1 m diameter sphere in the middle. electron orbits The Spacious Atom
Background image of page 6
orbits that are sometimes called shells. As the number of electrons increases, they start to fill orbits farther out from the nucleus. In most cases, electrons are lost or gained only from the outermost orbits. electron orbits
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 29

atoms1Opt - 100s of free ppts from www.pptpoint.com library...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online