A Particulate View
A substance in which all particles are the same
What is a Pure Substance?
A Magnesium Cation with a 2+ charge has a Mass Number of 24. How many Protons and Electrons are present?
What are 12 Protons and 10 Electrons?
Moles of Potassium contained in 200 grams of Potassium
A substance composed of 2 or more elements
What is a compound?
Atomic Mass Number is determined by
An Oxygen Anion with a 2- charge has a Mass Number of 16. How many Protons and Electrons are present?
What are 8 Protons and 10 Electrons?
Mass (in mg) contained in 2.63 moles of Nickel
What is 1.54 x 10^5 mg of Nickel?
Composition varies from one part of the mixture to another
What is a Heterogenous Mixture?
Isotopes of the same element have this in common
What are Protons and Electrons?
Most of the mass within an Atom is found within ___ _______
What is the nucleus?
Atoms of Cs contained in 595 kg of Cs
Pancake Syrup would be classified as a
What is a Homogenous Mixture?
Number of Electrons in a Chlorine Ion that has a Mass Number of 35
What are 18 Electrons?
Silicon has 3 naturally occurring Isotopes. Si-28, Si-29, and Si-30. Given the following information, calculate the average atomic mass of Silicon.
Si-28: Isotopic Mass of 27.976927 and an Abundance of 92.23%
Si-29: Isotopic Mass of 28.976495 and an Abundance of 4.67%
Si-30: Isotopic Mass of 29.973770 and an Abundance of 3.10%
(Give correct number of Significant Figures)
What is 28.1 AMU?
Mass (in grams) of 1.1 x 10^23 gold atoms
What is 36 grams of Gold?
The smallest particle of an element that retains the identity of that element
What is an Atom?
True or False: An Oxygen atom with a Mass Number of 18 contains the same number of Protons, Neutrons, and Electrons?
False
What is 345.55 amu?
A 20.0 gram element contains 4.95 x 10^23 atoms. Identify the element.
What is Magnesium?