Table of Elements

Dmitri Mendeleev created the periodic table of elements in 2020

• true

• false

Answer explanation

Mendeleev created the Periodic Table in 1869

He is a Russian scientist who used patterns in properties to create the first Periodic Table

Which element has an atomic number of 20?

• hydrogen

• calcium

• titanium

• iron

Scientists use the periodic table to quickly refer to information about an element, like atomic mass and chemical symbol.

• true

• false

The table of elements can be used to predict the properties of elements, even those that have not yet been discovered.

• true

• false

Tags

NGSS.HS-PS1-1

Which element has an atomic mass(weight) of 10.811?

• Carbon

• Boron

• helium

• nitrogen

Which element has an element symbol of Ag?

• silver

• Boron

• hydrogen

• nitrogen

Which element has an element symbol of C?

• carbon

• Boron

• cobalt

• calcium

Which element has an element symbol of Li?

• silver

• lithium

• Oxygen

• aluminum

It is the only metal that is always liquid no matter the temperature. So it stays at a liquid stay even at room temperature.

• silver

• lithium

• mercury

• aluminum

Metals are good conductors of heat and electricity,

• false

• true

Tags

NGSS.MS-PS3-4