Periodic Table Of Elements - Group 18 & Group 1

What are the elements in group 18 (the far right) of the periodic table called?

• Alkali metals

• Alkaline earth metals

• Halogens

• Noble gases

Diagram shows the symbol of neon. Which statements is not true about neon?

• Neon exist as a monatomic elements

• Neon has low melting and boiling point

• Neon has a low density

• Neon reacts with bromine to form a covalent compound

Tags

NGSS.HS-PS1-1

The symbol for helium is

• H

• He

• Hl

• Hm

Tags

NGSS.HS-PS1-1

Why is Helium used in divers' tank but not hydrogen gas?

• Helium is lighter than hydrogen

• Helium is inert to any chemical reactions

• Helium is cheaper

• Helium is easy to get from market

Argon (proton number =18) is inert to any chemical reaction because

• It is light

• it is located in Group 18

• it has achieved stable duplet electron arrangement

• it has achieved stable octet electron arrangement

Tags

NGSS.HS-PS1-1

Noble Gases are in group # ___.

• 12

• 18

• 8

• 3

Groups on the periodic table are arranged...

• Vertically

• Horizontally

• Diagonally from bottom right corner

• Diagonally from top right corner

Each horizontal row on the periodic table is called a what?

• Group

• Row

• Period

• Family

Elements in the same group or column have the same ...

• # of valence electrons

• # of shells

• # of protons

• Mass Number

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

An atom of element R has 14 neutrons. Nucleon number of element R is 27. In which Group and period R located in Periodic Table?

• Group 13. period 2

• Group 14, Period 2

• Group 13, Period 3

• group 14, Period 3