Chemistry S1 Study Guide 2024-2025

Front

How many electrons can the first energy level hold?

Back

2

Front

What is an isotope?

Back

Two atoms of the same element with different amounts of neutrons.

Front

In the electron cloud model of the atom, what does the cloud (or orbital) represent?

Back

The probable location of an electron.

Front

What did the Rutherford gold foil experiment conclude?

Back

An atom consists mostly of empty space.

Front

How many protons does this isotope of titanium have?

Back

22.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.

Front

What is a chemical bond?

Back

A lasting attraction between atoms that enables the formation of chemical compounds.

Front

What are the three main types of chemical bonds?

Back

Ionic, covalent, and metallic bonds.