In what year Dmitri Ivanovitch Mendeléev created the first accepted version of the periodic table.

Mendeleeve grouped elements according to their __________, and as he did, he found that the families had similar chemical properties

________were left open to add the new elements he predicted would occur.

The most abundant element in the earth’s crust is

Elements are organized on the table according to their

The atomic number is unique to that element. No two elements have the same atomic number.

Metals can be stretched into thin wires, so it means it is

Metals can be pounded into thin sheets

A chemical property of metal is its reaction with water which results in

are poor conductors of heat and electricity

_____ are not ductile or malleable

Solid nonmetals are brittle and break easily

metals are

metals are on the left of the line of periodic table except for __________ which is considered non-metal.

Many non-metals are

They conduct heat and electricity better than non-metals but not as well as metals

They are ductile and malleable.

the ____ are to the upper right of the periodic table separated by metalloids

elements in the periodic table are also grouped into families which are the________

Elements in each family have similar but not identical properties

elements in families have dissimilar properties

lithium (Li), sodium (Na), potassium (K), and other members of family have dissimilar properties

All elements in a family have the same number of

Each horizontal row of elements in the periodic table is called

The elements in a period are NOT alike in properties.

The first element in a period is always an

The last element in a period is always

the _____ square sits atop Family IA, but it is not a member of that family. It is in a class of its own.

The _________ family is found in the first column of the periodic table.

They are the most reactive metals.

They react violently with water.

They are always bonded with another element.

What makes an element reactive?

select all that applies

They are never found uncombined in nature

They have two valence electrons.

Elements with two valence electrons are typically found in Group 2 of the periodic table, also known as the___________

These elements include:

1. Beryllium (Be) - Atomic number 4

2. Magnesium (Mg) - Atomic number 12

3. Calcium (Ca) - Atomic number 20

4. Strontium (Sr) - Atomic number 38

5. Barium (Ba) - Atomic number 56

6. Radium (Ra) - Atomic number 88

the purple colored metals on the figure is group of

yellow colored is family of

They are good conductors of heat and electricity

These are the metals you are probably most familiar with: copper, tin, zinc, iron, nickel, gold, and silver.

________are elements that have 1 or more valence electrons, which they lose when they form bonds with other atoms

__________ have properties similar to one another and to other metals, but their properties do not fit in with those of any other family

Copper, silver, and gold are transition metals in group 11 of the periodic table and are also known as_________

They are a group of three metals used to make coins

This family includes the most abundant metal in the earth’s crust

is the most abundant metal in the Earth's crust, making up 8.23% of its elements

The most abundant naturally occurring gas is __________ , which makes up about 78% of air

this family contains the semi-metal boron (B) and metals aluminum (Al), gallium (Ga), indium (In), and thallium (Tl).

Atoms of this family have 4 valence electrons.

is called the "basis of life" because it's a fundamental component of all living things

This family includes non-metals, metalloids, and metals

Atoms in this family have 5 valence electrons. They tend to share electrons when they bond

Group 15 elements are also called the _____________. It includes nitrogen, phosphorus, arsenic, antimony and bismuth elements.

________is the most abundant element in the earth’s crust. It is extremely active and combines with almost all elements.

Atoms of this family have 6 valence electrons

Chalcogens also known as

also called the chalcogens, consists of the elements found in Group 16 of the periodic table and is considered among the main group elements. It consists of the elements oxygen, sulfur, selenium, tellurium and polonium

The elements in this family are fluorine, chlorine, bromine, iodine, and astatine.

_______react with alkali metals to form salts

Halogen atoms ONLY need to gain 1 electron to fill their outermost energy level.

Halogens react not only reacts with metals to form salts, also with __________ to form acids

The word _______ means "salt former" or "salt maker"

The thirty rare earth elements are composed of the__________series.

One element of the lanthanide series and most of the elements in the actinide series are called _________, which means synthetic or man-made.

The family of noble gases includes

Because they do not readily combine with other elements to form compounds, the noble gases are called________it means they do not react with other elements to form chemical compounds

All the noble gases are found in large amounts in the earth's atmosphere.

Hydrogen can be stored physically as either a gas or a liquid.

______is the lightest element

has the highest atomic number and highest atomic mass of all known elements as of 2024

Burst into flames when come in contact with water

We take “last element” to mean the element with the highest atomic number.

is the most widely used metal on the periodic table, making up 90% of all refined metal. It's used in many applications, including electronics and automobiles

is considered the most dangerous element on the periodic table because of its toxicity, radioactivity, and reactivity