Periodic Table of Elements

The horizontal rows on the periodic table are called

• groups

• families

• periods

• atomic numbers

These elements located on the "stair-step" line are sometimes called "semiconductors."

• Metals

• Nonmetals

• Metalloids

• Groups

Tags

NGSS.HS-PS1-1

In the modern periodic table elements are arranged by:

• atomic mass
• atomic number
• valence electrons
• number of isotopes

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

One of the advantages of classifying elements systematically in the Periodic Table of Elements is

• Making it easier for the scientists to choose atoms

• Knowing the number of neutrons in an element

• Predicting the chemical characteristics of an element

• Identifying the scientist who discovered the element

Which of the following statements is true about the Periodic Table of Elements?

• There are 18 Groups and 8 Periods in the Periodic Table of Elements

• Groups are the horizontal rows of elements

• Periods are the vertical columns of elements

• Elements that have the same number of valence electrons are arranged in the same group

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

• Proton

• elecrtron

• groups

• neutrons

How many electrons do atoms need to be stable?

• 1

• 2

• 7

• 8

Which of the following is a halogen?

• Krypton
• Bromine
• Potassium
• Bismuth

Elements in group 2 are also known as:

• Alkaline Earth Metals
• Halogens
• Noble Gases
• Alkali Metals

All of the following are metals EXCEPT:

• Cu (Copper)
• Pb (Lead)
• Br (Bromine)
• Na (Sodium)