PTable diagnostic

What are valence electrons?

• Any of an atom's electrons

• Electrons located on the first energy level

• Electrons not attached to any atom

• electrons located on the outer energy level

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What period is Lead (Pb) in?

• 6

• 4

• Metals

• 4A

How many electrons does Barium (Ba) have?

• 13

• 2

• 71

• 56

Tags

NGSS.HS-PS1-1

How many neutrons does Bromine (Br) have?

• 35

• 80

• 45

• 7

Tags

NGSS.HS-PS1-8

What is group name of the most reactive metals?

• Noble gases

• Halogens

• Alkali metals

• Alkaline earth metals

Why are halogens so reactive?

• They want to get rid of their only valance electron

• They only need one more electron

• They are non reactive, they have a full shell

The atomic number tells you what?

• number of electrons
• number of protons
• number of neutrons
• both electrons and protons in an atom.

Elements which are shiny, conduct electricity and heat are called

• metal
• nonmetal
• metalloid
• nonexistent

Which is a halogen?

• Helium
• Chlorine
• Oxygen
• Neptune

Which is an alkali metal?

• Magnesium
• Iron
• Sodium
• Europium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2