Periodic Table

Front

What does the symbol 'C' represent in the periodic table?

Back

Chemical symbol

Front

In which period is Sodium (Na) located in the periodic table?

Back

Period 3

Front

In which group is Sodium (Na) found in the periodic table?

Back

Group 1

Front

How is the Modern Periodic Table of Elements arranged?

Back

By atomic number

Front

What does the number 13 represent in an element square?

Back

Atomic number

Front

What is the atomic mass of Aluminum (Al)?

Back

26.981538

Front

What is the significance of the atomic number in the periodic table?

Back

It represents the number of protons in an atom's nucleus.

Front

What is the difference between atomic mass and atomic number?

Back

Atomic mass is the weighted average mass of an element's isotopes, while atomic number is the number of protons.

Front

What does the term 'valence electrons' refer to?

Back

Electrons in the outermost shell of an atom that determine its chemical properties.

Front

What is the general trend of atomic size in the periodic table?

Back

Atomic size increases down a group and decreases across a period.