Periodic Table Basics FLASHCARD

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 atomic number of oxygen?

Back

8

Front

Which element has an atomic number of 12?

Back

Magnesium

Front

What are valence electrons?

Back

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

Front

How many valence electrons does oxygen have?

Back

6

Front

Which element is in Group 16 and has 6 valence electrons?

Back

Selenium

Front

What is atomic mass?

Back

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

Front

Which element has an atomic mass of 10.81?

Back

Boron

Front

Where are the metalloids located on the periodic table?

Back

Metalloids are located along the zig-zag line that divides metals and nonmetals, often highlighted in green.

Front

What are the main groups of the periodic table?

Back

The main groups are alkali metals, alkaline earth metals, transition metals, halogens, and noble gases.