Bohr Models

Front

What is the arrangement of electrons in an atom?

Back

Electrons are arranged in energy levels.

Tags

NGSS.HS-PS1-1

Front

Define a valence electron.

Back

A valence electron is an electron in the outermost energy level (ring) of an atom.

Tags

NGSS.HS-PS1-1

Front

What does the period number on the periodic table represent?

Back

The period number is equal to the number of energy levels in an atom.

Front

How are periods arranged on the periodic table?

Back

Periods are arranged in horizontal rows.

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is the nucleus of an atom composed of?

Back

The nucleus is composed of protons and neutrons.

Tags

NGSS.MS-PS1-1

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the significance of the atomic number?

Back

The atomic number represents the number of protons in an atom and determines the element's identity.

Front

How do you determine the number of neutrons in an atom?

Back

The number of neutrons can be determined by subtracting the atomic number from the atomic mass.

Front

What is an ion?

Back

An ion is an atom that has gained or lost one or more electrons, resulting in a net charge.