Answered: 1-An atomic cation with a charge of +2…

Living by Chemistry

2nd Edition

ISBN:9781464142314

Author:Angelica M. Stacy

Publisher:Angelica M. Stacy

ChapterU1: Alchemy: Matter, Atomic Structure, And Bonding

Section: Chapter Questions

Problem 3STP

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1-An atomic cation with a charge of +2 has the following electron configuration: [He] 2s²2p⁴

What is the chemical symbol for the ion?
How many electrons does the ion have?
How many 2s electrons are in the ion?

Ammonium perchlorate (NH₄ClO₄) is powerful solid rocket fuel, used in the Space Shuttle boosters. It decomposes into nitrogen (N₂) gas, chlorine (Cl₂) gas, oxygen (O₂) gas, and water vapor, releasing a great deal of energy. Calculate the moles of chlorine produced by the reaction of 0.90mol of ammonium perchlorate. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.

_____________

3-How many protons and neutrons are in an atom of Th-229 ?

Number of protons= ________

Number of neutrons= _______

The chemical formula for beryllium sulfide is BeS.

A chemist determined by measurements that 0.055 moles of beryllium sulfide participate in a chemical reaction. Calculate the mass of beryllium sulfide that participates.

Be sure your answer has the correct number of significant digits.

_______g

List all possible values of the magnetic quantum number m_l for a 4d electron.

m_l = __________

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