Periodic Table Flashcard #1

Front

What is the atomic number?

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 atomic number for Lithium?

Back

3

Front

How many electrons does a neutral atom of Hydrogen have?

Back

1

Front

What is the atomic mass?

Back

The atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

What is the atomic mass for Argon?

Back

40

Front

How many electrons are in an atom of Silicon (Si)?

Back

14

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

How many neutrons are in an atom of Lithium (Li)?

Back

4

Front

What is an isotope?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the significance of the Periodic Table?

Back

The Periodic Table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.