'8 amu' diaporamas de présentation

Question 1

How can you tell a chemical change occurred? Two substances are mixed together New atoms are being formed A new substance forms A liquid is formed. Question 1. Noble gases found in group 18 are special because: They react very easily They always gain electrons

506 views • 40 slides

Isotopes

Isotopes. Of the Atom. Isotopes At the conclusion of our time together, you should be able to:. Define an isotope Determine the number of protons, neutrons and electrons for an isotope Define average atomic mass Determine the average atomic mass for an element given the isotopes.

541 views • 28 slides

Naming Ionic Compounds & Ions

375 views • 23 slides

Percent Composition

Percent Composition. The total amount or % of an element in its compound. Percent Composition. Three STEPS Formula determination ? using Criss-cross determine subscripts 2) Formula mass ? using periodic table, total all elements 3) % Calculation

500 views • 18 slides

Average Atomic Mass

Average Atomic Mass. Chapter 7.4 Average Atomic Mass. Objective: (1) To calculate the average atomic mass for an atom. Average Atomic Mass. Weighted average of the masses of the existing isotopes of an element. Recall: Atomic Mass Unit. The unit that describes the mass of an atom

329 views • 14 slides

Finding An Isotopic Mass

Finding An Isotopic Mass. A sample of boron consists of 10 B (mass 10.0 amu) and 11 B (mass 11.0 amu) If the average atomic mass of B is 10.8 amu, what is the % abundance of each boron isotope?. Assign X and Y values: X = % 10 B Y = % 11 B Determine Y in terms of X

346 views • 6 slides