QBA 2 Review Chemistry

Electron Configuration

100

What is the electron configuration of a neutral carbon atom?

1s²  2s² 2p²

200

Which principle states that no two electrons in an atom can have the same set of four quantum numbers?

What is the Pauli Exclusion Principle?

300

What is the electron configuration for a neutral oxygen atom?

1s² 2s² 2p⁴

400

In the context of electron configuration, what does the term "valence Electrons" refer to?

What are the electrons in the outermost shell of an atom that are involved in chemical bonding.

500

What is the electron configuration for a neutral sodium atom, and how many valence electrons does it have?

1s² 2s² 2p⁶ 3s¹

Reactions

100

A+B=AB

What type of reaction is this?

Synthesis

200

AB-->A+B

What type of reaction is this?

Decomposition

300

C₆H₅COOH + O_{2 ------->} CO₂  + H₂O

What type of reaction is this?

Combustion

400

AB + C --------> AC + B

What type of reaction is this?

SIngle Replacement

500

What type of reaction is this?

AB + CD-------> AC + BD

Double Displacement

Bonds

100

What type of bond is formed when electrons are transferred from one atom to another?

What is an ionic bond?

200

In which type of bond do atoms share pairs of electrons?

What is a covalent bond?

300

What type of bond is characterized by a "sea of electrons" that are free to move around, allowing for conductivity?

What is a metallic bond?

400

What is the primary difference in electronegativity between the two atoms involved in an ionic bond?

What is a large difference (typically greater than 1.7)

500

Name a compound that is held together by ionic bonds and is essential for life?

NaCl sodium chloride

Balancing Equations

100

What is the purpose of balancing a chemical equation?

What is to ensure that the number of atoms of each element is the same on each side?

200

What is the first step you should take when balancing a chemical equation?

What is write down the number of atoms of each element present on both sides of the equations?

300

What is the law that states that matter cannot be created or destroyed in a chemical reaction, which is fundamental to balancing equations?

What is the law of Conservation of mass?

400

Balance the following equation: _____H2 + ____O2 ---> ____H2O

2 H2 + 1O2 ---> 2H2O

500

Balance the following Equation: _____KClO3 ---> KCl + ______O2

2KClO3 ---> 2KCl + 3O2

Chemical compounds

100

Aluminum Oxide

What is Al₂O₃?

200

CO₂

Carbon Dioxide

300

Cu₂O

What is Copper (I) Oxide?

400

Strontium Bromide

What is SrBr₂?

500

Boron Phosphide

What is BP?