Science Flashcard 3A

Front

Which particle is found in the nucleus and has a positive charge?

Back

Proton

Front

What are isotopes?

Back

Isotopes are variants of a chemical element that have the same number of protons (atomic number) but different numbers of neutrons, resulting in different mass numbers.

Tags

NGSS.HS-PS1-8

Front

How can you determine the number of neutrons in an atom if you know its atomic number and mass number?

Back

Subtract the atomic number from the mass number.

Front

What term describes the path that electrons follow around the nucleus?

Back

Electron shell.

Front

Which is the simplest element?

Back

Hydrogen.

Front

What is the charge of a neutron?

Back

Neutrons have no charge (neutral).

Front

What is the atomic number of an element?

Back

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

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus of an atom.

Front

What is an electron?

Back

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

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.

Tags

NGSS.MS-PS1-1