CP Chem Exam Review Part 2

Front

What is the formula for calcium nitride?

Back

Ca₃N₂

Front

What is the charge on the strontium ion?

Back

2 +

Front

If an atom has 5 valence electrons, what would its oxidation state be?

Back

-3

Front

What is the formula for sulfur hexafluoride?

Back

SF₆

Front

Calculate the atomic mass of element X given the following isotopes: 28X (27.977 amu at 92.21%), 29X (28.977 amu at 4.70%), 30X (29.974 amu at 3.09%). Identify the element.

Back

The element is Silicon (D).

Front

Define valence electrons.

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

Front

What is the significance of oxidation states in chemical reactions?

Back

Oxidation states indicate the degree of oxidation or reduction of an atom in a compound, helping to understand electron transfer.

Front

Explain the concept of ionic compounds.

Back

Ionic compounds are formed when atoms transfer electrons, resulting in the attraction between positively and negatively charged ions.

Front

What is the periodic table and its importance?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

Define atomic mass and how it is calculated.

Back

Atomic mass is the weighted average mass of an element's isotopes, calculated using the relative abundance and mass of each isotope.