Atomic Structure Q1

Front

What is emission spectra?

Back

The emission spectra is the unique pattern of light emitted by an atom or molecule when it transitions from a higher energy state to a lower energy state.

Front

What are subatomic particles with a negative charge?

Back

Electrons.

Front

What are subatomic particles with a positive charge?

Back

Protons.

Front

What are nonmetals usually considered?

Back

Usually negative ions.

Front

How many neutrons does Potassium-39 have?

Back

20.

Front

What is the charge of neutrons?

Back

Neutrons have no charge (neutral).

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 an isotope?

Back

Atoms of the same element with different numbers of neutrons.

Front

What is the role of electrons in an atom?

Back

Electrons are responsible for chemical bonding and reactions.