Intro to Periodic Table Flashcard

Front

What is a nonmetal?

Back

A nonmetal is an element that typically lacks the properties of metals, such as conductivity and malleability. Nonmetals are usually brittle in solid form and can be gases or liquids at room temperature.

Front

What are the three phases of matter?

Back

The three phases of matter are solid, liquid, and gas. Elements can exist in one or more of these states depending on temperature and pressure.

Front

Which group of elements contains all three phases of matter?

Back

The Halogens (Group 17) contain elements that exist in all three phases of matter: solid (Iodine), liquid (Bromine), and gas (Fluorine and Chlorine).

Front

Who reorganized the periodic table by increasing atomic number?

Back

Henry Mosley is credited with reorganizing the periodic table by increasing atomic number instead of atomic mass.

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 do elements in Group 17 have?

Back

Elements in Group 17 have 7 valence electrons.

Front

Why did Mendeleev use atomic mass to organize his periodic table?

Back

Mendeleev used atomic mass because protons had not yet been discovered, and it provided a more accurate repetition of properties at that time.

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, allowing for predictions about element behavior.

Front

What are transition metals?

Back

Transition metals are elements found in Groups 3-12 of the periodic table, known for their ability to form variable oxidation states and colored compounds.

Front

What are noble gases?

Back

Noble gases are elements in Group 18 of the periodic table, characterized by their lack of reactivity due to having a full valence shell.