C3.1.3 Electronic Configuration

What is atomic number?

The number of protons in an atom of an element.

What is mass number?

The number of protons and neutrons in an atom of an element.

Where are protons located and what is their charge?

Protons are located in the nucleus and have a positive charge.

Where are neutrons located and what is their charge?

Neutrons are located in the nucleus and have no charge.

Where are electrons located and what is their charge?

Electrons are located orbiting the nucleus and have a negative charge.

What is the atomic number of Moscovium?

The atomic number of Moscovium is 115.

How do you calculate the number of neutrons in an atom of Moscovium?

Number of neutrons = mass number - atomic number.

How many neutrons are in an atom of Moscovium?

There are 174 neutrons in an atom of Moscovium (mass number 289 - atomic number 115).

Why are atoms considered electrically neutral?

Atoms are electrically neutral because the number of protons equals the number of electrons.

What is an ion?

An atom that has gained or lost electrons.

What type of elements typically form negative ions?

Non-metals typically form negative ions.

What type of elements typically form positive ions?

Metals typically form positive ions.

How are positive ions formed?

Positive ions are formed when atoms lose electrons.

How are negative ions formed?

Negative ions are formed when atoms gain electrons.

What rule is used to determine the electronic configuration of an atom?

The 2,8,8 rule.

What is the electronic configuration of Lithium?

The electronic configuration of Lithium is 2,1.

What is the electronic configuration of Sodium?

The electronic configuration of Sodium is 2,8,1.

Why is it important to evaluate models in science?

To see which features of the model are accurate and which features are not accurate.

What happens to electron configurations when atoms absorb electromagnetic radiation?

Electrons may move to a higher energy level, further from the nucleus.

What happens to electron configurations when atoms emit electromagnetic radiation?

Electrons may move to a lower energy level, closer to the nucleus.

What is the stable electronic configuration of an atom?

An atom has a full outer shell.

What differentiates an electrically neutral atom from a stable atom?

Electrical neutrality refers to equal protons and electrons; stability refers to a full outer shell.

Which elements are examples of ions?

Ions can be any element that has gained or lost electrons.

What is the electronic configuration of Argon?

The electronic configuration of Argon is 2,8,8.

What is the electronic configuration of Carbon?

The electronic configuration of Carbon is 2,4.

How does the electronic configuration relate to the group of an element in the periodic table?

Elements in the same group have the same number of electrons in their outer shell.