Semester 1 8th Grade Science

What do elements in the same group on the periodic table have in common?

• Similar Chemical Symbols
• The same atomic number
• Similar Chemical Properties
• The same average atomic mass

Which group lists the parts of an atom from the most massive to the least massive?

• Proton, Nucleus, Electron
• Nucleus, Electron, Proton
• Electron, Nucleus, Proton
• Nucleus, Proton, Electron

If Calcium is in period 4, group 2 with an atomic number of 20. How many valence electrons are in the outer most ring of its electron orbit?

• 4
• 2
• 20
• 6

The first person to say that atoms exist was?

• John Dalton
• JJ. Thompson
• Democratus
• Earnest Rutherford

Elements that are shiny and conduct heat and electricity well are called what?

• Metals
• NonMetals
• Metalloids
• All Elements

What subatomic particles are found in side the nucleus?

• Neutrons
• Electrons
• Neutrons and Protons
• Neutrons, Protons, and Electrons

What is an entire atom considered?

• Negative
• Neutral
• Positive
• Neutral, Positive and Negative

A gas becomes a liquid

• melting
• sublimation
• Evaporation
• Condensation

Stars are considered which of matter?

• Solid
• Liquid
• Gas
• Plasma

A solid becomes a gas

• melting
• sublimation
• Evaporation
• Condensation