Ch 11 - Electrons and Energy Levels

Why are the atoms in group 18 stable

• It has no valence electron

• There is no unpaired valence electrons

• It has a high number of valence electrons

• Group 18 is not stable

An unstable atom become stable by

• losing valence electrons

• forming chemical bonds with other atoms.

• gaining valence electrons

• mixing with other atoms

Which part of an atom participates in chemical bonding

• proton

• all electrons

• neurton

• valence electrons

Where are the valence electrons

• nowhere

• anywhere

• the outermost

• innermost

How many valence electrons can fit in the first energy level?

• 2
• 1
• 4
• 8

What is the atomic number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

What noble gas does not have 8 valence electrons?

• Radon
• Krypton
• Helium
• Neon

What group on the periodic table is stable on its own because they have all their valence electrons?

• Noble Gases
• Halogens
• Alkali
• Alkaline Earth

What is represented by the dots in an electron dot diagram?

• the number of atoms sharing an electron
• the total number of electrons in an atom
• the number of valence electrons in an atom
• the number of electrons circling a nucleus

What's a valence electron?

• electrons in the second energy level
• electrons in the outermost energy level
• the atomic number
• electrons in the first level

Tags

NGSS.MS-PS1-1