Elaine Velicaria

University of California - San Diego
Student Aide

Biography

Human Biology new grad from UC San Diego

Education

BS Human Biology
University of California - San Diego

Educator Statistics

Numerade tutor for 6 years
19 Students Helped

Topics Covered

Discover the Power of the Cell: Unleash Your Potential with Our Products
Understanding Structure and Bonding: A Comprehensive Guide
Discover the Wonders of Chemistry: Your Introductory Guide
Atoms, Molecules, and Ions: Understanding the Building Blocks of Matter
Unlocking the Power of Periodic Table Properties | Boost Your Knowledge

Elaine's Textbook Answer Videos

03:10
Chemistry and Chemical Reactivity

Write the electron configurations for $\mathrm{Mg}$ and $\mathrm{Ar}$ using both spdf notation and orbital box diagrams. Describe the relationship of the atom's electron configuration to its position in the periodic table.

Chapter 7: The Structure of Atoms and Periodic Trends
Elaine Velicaria
03:12
Chemistry and Chemical Reactivity

Depict the electron configuration for each of the following atoms using spdf and noble gas notations.
(a) Arsenic, As. A deficiency of As can impair growth in animals, and larger amounts are poisonous.
(b) Krypton, Kr. It ranks seventh in abundance of the gases in Earth's atmosphere.

Chapter 7: The Structure of Atoms and Periodic Trends
Elaine Velicaria
05:11
Chemistry and Chemical Reactivity

Using spdf and noble gas notations, write electron configurations for atoms of the following elements. (Try to do this by looking at the periodic table but not at Table $7.3 .$ )
(a) Strontium, Sr. This element is named for a town in Scotland.
(b) Zirconium, Zr. The metal is exceptionally resistant to corrosion and so has important industrial applications. Moon rocks show a surprisingly high zirconium content compared with rocks on Earth.
(c) Rhodium, Rh. This metal is used in jewelry and in catalysts in industry.
(d) Tin, Sn. The metal was used in the ancient world. Alloys of tin (solder, bronze, and pewter) are important.

Chapter 7: The Structure of Atoms and Periodic Trends
Elaine Velicaria
03:32
Chemistry and Chemical Reactivity

Use noble gas and spdf notations to depict electron configurations for the following metals of the third transition series.
(a) Tantalum, Ta. The metal and its alloys resist corrosion and are often used in surgical and dental tools.
(b) Platinum, Pt. This metal was used by preColumbian Indians in jewelry. Now it is still used in jewelry but it is also the basis for anticancer drugs and catalysts (such as those in automobile exhaust systems).

Chapter 7: The Structure of Atoms and Periodic Trends
Elaine Velicaria
03:06
Chemistry and Chemical Reactivity

Americium, Am, is a radioactive element isolated from spent fuel in nuclear reactors and used in home smoke detectors. Depict its electron configuration using noble gas and spdf notations.

Chapter 7: The Structure of Atoms and Periodic Trends
Elaine Velicaria
05:30
Chemistry and Chemical Reactivity

Predict electron configurations for the following elements of the actinide series of elements. Use noble gas and spdf notations.
(a) Plutonium, Pu. The element is best known as a by-product of nuclear power plant operations.
(b) Curium, Cm. This actinide was named for Marie Curie (page 72 ).

Chapter 7: The Structure of Atoms and Periodic Trends
Elaine Velicaria
1 2 3