Chapter 5 Periodic Table

Front

What is the second most abundant element found in the earth's atmosphere?

Back

Oxygen is the second most abundant element in the earth's atmosphere, after nitrogen.

Front

What element category is mostly gases, brittle, and poor conductors of heat and electricity?

Back

Nonmetals are mostly gases, brittle, and poor conductors of heat and electricity.

Front

What is the simplest element?

Back

Hydrogen is the simplest element, consisting of only one proton and one electron.

Front

What family (color group) is the MOST reactive?

Back

The dark blue family (alkali metals) is the most reactive group on the periodic table.

Front

What does the number at the top of each square on the periodic table represent?

Back

The number at the top of each square on the periodic table is the atomic number, which indicates the number of protons in an atom.

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 are metalloids?

Back

Metalloids are elements that have properties of both metals and nonmetals, and they are typically semiconductors.

Front

What is a chemical symbol?

Back

A chemical symbol is a one or two-letter abbreviation used to represent an element on the periodic table.

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.

Front

What are noble gases?

Back

Noble gases are a group of elements in Group 18 of the periodic table that are colorless, odorless, and inert under standard conditions.