IN Class Chem Mid Term Review Questions

Front

What is the maximum number of electrons an orbital can hold?

Back

2 electrons.

Front

Identify the element based on its orbital diagram: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰.

Back

Iron.

Front

What type of flame is best to use in the lab?

Back

A controlled shorter blue flame with all the methane gas burning efficiently.

Front

How many valence electrons are present in the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰?

Back

2 valence electrons.

Front

Which element in Period 2 has the greatest atomic radius?

Back

Lithium (Li).

Front

Define an orbital in chemistry.

Back

An orbital is a region in an atom where there is a high probability of finding electrons.

Front

What is the significance of valence electrons?

Back

Valence electrons determine how an element reacts chemically and its bonding behavior.

Front

Explain the difference between a blue flame and a yellow flame in a Bunsen burner.

Back

A blue flame indicates complete combustion with efficient burning, while a yellow flame indicates incomplete combustion with soot.

Front

What is the electron configuration for Argon?

Back

1s² 2s² 2p⁶ 3s² 3p⁶.

Front

How do you determine the number of valence electrons from an electron configuration?

Back

Count the electrons in the outermost s and p orbitals.