Review - Atoms and Electron City

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element. It consists of a nucleus made of protons and neutrons, surrounded by electrons in orbitals.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is an electron?

Back

An electron is a negatively charged subatomic particle that orbits the nucleus of an atom.

Front

How many protons are in Sodium (Na)?

Back

Sodium (Na) has 11 protons.

Front

What is the maximum number of electrons that can occupy the first energy level?

Back

The first energy level can hold a maximum of 2 electrons.

Front

What is the maximum number of electrons that can occupy the second energy level?

Back

The second energy level can hold a maximum of 8 electrons.

Front

What is a sublevel in an atom?

Back

A sublevel is a division of an energy level in an atom, which contains orbitals where electrons are likely to be found.

Front

How many orbitals are in the d sublevel?

Back

The d sublevel contains 5 orbitals.

Front

What is the maximum number of electrons that can occupy the d sublevel?

Back

The d sublevel can hold a maximum of 10 electrons.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is a substance formed when two or more different types of atoms bond together.