Each column in the periodic table is called a _________ .

• period
• group
• cluster
• unit

Tags

NGSS.HS-PS1-1

Groups on the periodic table are __________.

• Horizontal Rows
• Vertical Columns

Periods on the periodic table are __________.

• Horizontal Rows
• Vertical Columns

neutron

• A subatomic particle that has a positive charge and that is found in the nucleus of an atom

• not able to conduct heat or electricity, little to no metallic luster

• A subatomic particle that has a negative charge

• A small particle in the nucleus of the atom, with no electrical charge

Tags

NGSS.MS-PS1-1

A subatomic particle that has a negative charge

• nobles gases

• protons

• electrons

• neutrons

Tags

NGSS.MS-PS2-3

Elements that occur in vertical columns on the periodic table.

• Neutron

• metalloids (semimetals)

• groups

• Proton

Vertical columns on the periodic table are called ___?

• groups

• periods

• rows

• families

The periodic table is mostly made up of what type of element?

• Metals

• Nonmetals

• Metalloids

The periodic table is a chart that organizes the elements based on their atomic properties. Elements in the periodic table are organized according to the periodic law. The periodic law states that chemical and physical properties of elements are periodic functions of their atomic numbers (the number of protons in the nucleus). As the atomic number of elements increases, different elements display similar characteristics at regular intervals.

Periodic law states that elements are arranged _______________________________________________________________.

• in alphabetical order.

• from largest to smallest.

• as periodic functions of their atomic numbers.

• there is no rhyme or reason.

In 1869, Dmitri Mendeleev developed the first periodic table, organizing the elements according to atomic weight. When he ordered the elements, he noticed that there were patterns of repeating properties. The modern periodic table sequences elements from left to right by atomic number.

This was the first person to organize a periodic table.

• Neils Bohr

• Dmitri Mendeleev

• Democritus

• Ernest Rutherford