Periodic Table of Elements

What does the C represent?

• atomic mass

• atomic number

• element name

• chemical symbol

What does the 6 represent?

• atomic mass

• atomic number

• element name

• chemical symbol

Tags

NGSS.MS-PS1-1

What does 12.011 represent?

• atomic mass

• atomic number

• element name

• chemical symbol

Tags

NGSS.HS-PS1-1

"Carbon" is the .................. of the element.

• Name

• Nickname

• Chemical Symbol

• Pseudonym

The Modern Periodic Table of Elements is arranged by

• atomic mass

• atomic number

• valence electrons

• number of isotopes

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers

Which group of the periodic table is composed of inert (not reactive) gases?

answer choices

• alkali metals

• alkaline earth metals

• halogens

• noble gases

Which is an alkali metal?

• Magnesium

• Iron

• Sodium

• Europium

Answer explanation

Sodium is an alkali metal, making it the correct choice among the options provided.

Which is a halogen?

• Helium

• Chlorine

• Oxygen

• Neptune

Answer explanation

Chlorine is a halogen element. Helium, Oxygen, and Neptune are not halogens.

Elements in a .................. have similar chemical properties.

• period

• group

• row