1 / 6

VS MILLIONAIRE!

VS MILLIONAIRE! . 234 Pu 94. Look at the following isotopic notation: What is the mass number ? 234 What is its atomic number ? 94 Is this a balanced atom or an isotope ? isotope How many neutrons are present in its nucleus ? 140 What is this isotope called ? Plutonium 234

willow
Download Presentation

VS MILLIONAIRE!

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. VS MILLIONAIRE!

  2. 234 Pu 94 • Look at the following isotopic notation: • What is the mass number? 234 • What is its atomic number? 94 • Is this a balanced atom or an isotope? isotope • How many neutrons are present in its nucleus? 140 • What is this isotope called? Plutonium 234 • In a balanced state, how many electrons does this element have? 94

  3. Electron dot notation communicates what? The number of valence electrons Look at the following dot notation: Ar • How many valence electrons does this element have? 8 • Is this element stable or unstable? Very stable, it is a noble gas

  4. When an atom has more or less electrons than it has protons it is called a(n) isotope • Atoms that have more electrons than protons are called ions. • Atoms that have more protons than electrons are called ____cations__________. • The weighted average of an element’s isotopes determine its atomic mass. • Electrons in the outermost energy level of an atom are called valence electrons.

  5. Name the particles in an atom in order of least to most massive electron, proton, neutron. • The positively charged, central part of the atom is called the nucleus. • Go to the board and write the isotopic notation of tritium (mass # 3) (see p. 94) • The sum of the number of neutrons and the number of protons is called the atomic mass number. • What does the abbreviation Z stand for? Atomic number • What is Hund’s rule? As electrons fill sublevels, all sublevels will receive one before any receive two.

  6. The Aufbauprinciple describes how electrons fill suborbitals (the high rise hotel analogy). • How does an isotope of an element differ from the balanced atom of the same element? It will have more or less neutrons than protons. • Go to the board and write the correct electron configuration for magnesium Z=12. 1s2 2s2 2p6 3s2

More Related