Periodic Table & Elements Flashcard

Front

What are valence electrons?

Back

The electrons in the outermost shell of an atom that are involved in forming bonds.

Tags

NGSS.MS-PS1-1

Front

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

Back

Subtract the atomic number from the atomic mass.

Front

True or False: Most of the elements on the periodic table are classified as metals.

Back

True

Front

What does the number 1.00794 represent in the periodic table?

Back

Atomic mass of Hydrogen.

Front

In which group is Sodium (Na) found?

Back

Group 1.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom.

Front

Define atomic mass.

Back

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

Front

What are alkali metals?

Back

Elements in Group 1 of the periodic table, known for being highly reactive.

Front

What are halogens?

Back

Elements in Group 17 of the periodic table, known for their reactivity and formation of salts.

Front

What is the significance of the periodic table?

Back

It organizes elements based on their atomic number, electron configuration, and recurring chemical properties.