Unit 3: Periodic Table

A single horizontal row in the periodic table is called a_________________.

• group
• period
• graph
• density

Today’s periodic table arranges the elements by increasing ____________ in such a way that similar properties repeat at periodic intervals.

• Representative Elements
• transition elements
• atomic numbers
• groups

Tags

NGSS.HS-PS1-1

___________ are a group of gases that are very unreactive and do not normally combine with other elements.

• oxygen
• hydrogen
• transition gases
• noble gases

Who created the first valid periodic table of the elements arranged by atomic mass?

• Henry Moseley

• Dmitri Mendeleev

• Albert Einstein

• Isaac Newton

Group 1 is also called

• halogens

• alkaline earth metals

• alkali metals

• noble gases

Group 2 is also called

• halogens

• alkaline earth metals

• alkali metals

• noble gases

Group 17 is also called

• halogens

• alkaline earth metals

• alkali metals

• noble gases

Group 18 is also called

• halogens

• alkaline earth metals

• alkali metals

• noble gases

Elements that are conductive, lustrous, and have a high melting point

• metals

• non-metals

• metalloids

Elements that are poor conductors, dull, and have a low melting point

• metals

• non-metals

• metalloids