The Atom

Front

What is the charge of an electron?

Back

Negative

Front

What are the two main components of the nucleus of an atom?

Back

Protons and neutrons

Tags

NGSS.HS-PS1-8

Front

What is the role of protons in an atom?

Back

Protons determine the atomic number and identity of the element.

Front

What is the mass of a neutron compared to a proton?

Back

A neutron has approximately the same mass as a proton.

Front

What is the significance of the atomic number?

Back

The atomic number indicates the number of protons in an atom and defines the element.

Front

What are isotopes?

Back

Isotopes are atoms of the same element that have different numbers of neutrons.

Front

What is the concept of atomic mass?

Back

Atomic mass is the weighted average mass of an atom's isotopes.

Tags

NGSS.HS-PS1-7

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

Front

What is the principle of conservation of mass in chemical reactions?

Back

Mass is neither created nor destroyed in a chemical reaction.

Tags

NGSS.HS-PS1-7

Front

What is a valence electron?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2