Semester 1

Front

What are isotopes?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons, resulting in different atomic masses.

Front

How do you identify isotopes using symbols?

Back

Isotopes can be identified by their atomic mass number (superscript) and atomic number (subscript). For example, \(^{77}_{35}X\) and \(^{77}_{33}X\) are isotopes of the same element X.

Front

What is the atomic number of Chlorine?

Back

The atomic number of Chlorine is 17.

Front

What is the significance of valence electrons?

Back

Valence electrons determine how an element reacts chemically and are involved in forming bonds with other atoms.

Front

How many valence electrons do alkaline earth metals have?

Back

Alkaline earth metals have 2 valence electrons.

Front

What is the molar mass of a compound?

Back

The molar mass of a compound is the mass of one mole of that compound, expressed in grams per mole (g/mole).

Front

Calculate the molar mass of (NH4)2CO3.

Back

The molar mass of (NH4)2CO3 is 96.0 g/mole.

Front

What particles in an atom are neutral?

Back

Neutrons are the particles in an atom that are neutral and have no charge.

Front

What is the role of protons in an atom?

Back

Protons determine the atomic number of an element and contribute to the positive charge of the nucleus.

Front

What is an orbital diagram?

Back

An orbital diagram is a visual representation of the electron configuration of an atom, showing the distribution of electrons in atomic orbitals.