Review for Chem Fall Sem Exam 2024

Front

What do neutral atoms contain equal numbers of?

Back

Protons and electrons.

Front

What determines similar chemical and physical properties in a group of elements?

Back

Valence electrons.

Front

What is the mass of 2.0 mol of CO₂ (carbon dioxide)?

Back

88.02 g.

Front

Which element is the most electronegative?

Back

Fluorine (F).

Front

How many electrons can fit in the 2nd energy level?

Back

8.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the significance of valence electrons?

Back

They determine an element's chemical properties and bonding behavior.

Front

What is the formula to calculate the molar mass of a compound?

Back

Sum of the atomic masses of all atoms in the compound.

Front

What is electronegativity?

Back

A measure of an atom's ability to attract and hold onto electrons.

Front

What is the maximum number of electrons in the 1st energy level?

Back

2.