Atoms
the smallest particle of an element that retains the chemical properties of the element
What is...an Atom
The average mass number of the atoms in a sample of an element
What is ...the Atomic Mass
What are a group of metals that are soft and weak
What are...poor metals
The first 20 Elements of the Periodic table
Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Sodium, Magnesium, Aluminum, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Potassium, Calcium
A substance made up of one type of atom which cannot be broken down by chemical reaction to form a simpler substance.
What is ... an element
A region around the nucleus of an atom where a specific number of electrons can exist.
What is...the Electron Shell
What is the number of protons in the nucleus of an atom
What is ... the atomic number
These metals have strong oxidizing agents
What are ... Halogens
Oxygen and Sulfur are metals or Non metals.
What are... Metals.
A substance made up of two or more different elements that are chemically joined in fixed proportions.
What are ... Compounds
a group of eight electrons in a single electron shell.
What is ... an octet
These are very reactive because they have full outer electron shells
What are...Noble Gases
These metals are all hard, tough, shiny, and malleable
What are... Transition metals.
a column of elements in the periodic table that has ne addition electron shell as you go down the column.
What is...a group
A group of elements that have characteristic of both metals and nonmetals
What is a ...Semimetal
The nucleus of an atom contains these 2 things
What are...protons and neutrons
This group of elements become more metallic as you go down the group
What are ... Group V elements
Going this direction on the periodic table the more reactive the alkaline earth metal elements are
A set of elements with the same number of electron shells. It is shown a rows in the periodic table.
What is...a period
A characteristic of a metal that means it is bendable and easily shaped
What is ...Malleable
The basic Structure of an atom?
What is ... a nucleus at the center that is composed of neutrons and protons. then they have electrons that fly around the nucleus in different shells or layers.
How the elements are arranged on the Periodic Table
What is...by their atomic number.
Metals that react with water to form alkaline solutions. They are typically soft, silver white metals.
What are... Alkali Metals
Nonmetals with seven electrons in their outer shell, meaning they can react to form iconic or covalent bonds.
What are... Characteristics of Halogens
A substance that only conducts electricity under certain conditions
What is...Semiconductor