Atoms

What element is Cl

• Chlorine

• Carbon

• Crypton

• Cliven

How many neutrons are in an atom that has an atomic number of 12 and an atomic mass of 25

• 13

• 25

• 12

• 24

What is the symbol for potassium?

• P

• T

• K

• Po

What makes Hydrogen different than Helium?

• How many Neutrons it has

• How many electrons it has

• How many Protons it has

• One makes your voice squeaky

What charge does an electron have?

• Neutral

• Negative

• Positive

• Guilty

Which of these items are made from a pure element

• Water

• Steel hammer

• Fire

• Gold ring

Which of the substances could be elements? (assume circles of the same size are the same element).

Select all that apply

• A

• B

• C

• D

What do scientists call the smallest unit of matter that has its own recognizable identity?

• Atom

• Compound

• DNA

• Molecule

What charge does a Proton have?

• Neutral

• Negative

• Positive

• Innocent

How do scientists know matter is made of particles such as protons, neutrons and electrons?

• They can see the particles using advanced microscopes

• Because of experimentation

• Everyone has always known about atomic particles

• Someone famous decided it was true