J.J. Thomson used a cathode ray tube to find what particle in the atom?

• Proton
• Neutron
• Electron

What are electrons?

• Massive, positively charged particles
• Tiny, negatively charged particles
• Clouds of dust in the nucleus
• Neutral particles around the nucleus

Tags

NGSS.MS-PS1-1

This model was developed after J.J. Thompson discovered electrons, a particle smaller than an atom. Is shows electrons floating freely in a positive space.

• The "Plum Pudding Model" of the atom
• The "Rutherford Model" of the atom
• Democritus's model of the atom
• The "Solar System Model" of the atom

One property of nonmetals is that it they are good conductors of electricity.

• true

• false

What element in Group 1 is not a metal but a nonmetal?

• Helium
• Lithium
• Hydrogen
• Oxygen

Iron is a good conductor, malleable and magnetic. What type of element is Iron? 

• Metal
• Nonmetal
• Metalloid
• Pretty

Tags

NGSS.HS-PS1-1

Silicon is a semiconductor and has properties of both metals and nonmetals. What type of element is Silicon? 

• Metal
• Nonmetal
• Metalloid
• Pretty

Tags

NGSS.HS-PS1-1

Which elements are found on the right side of The Periodic Table?

• Metals
• Nonmetals
• Metalloids
• Water

Tags

NGSS.HS-PS1-1

How many total atoms are in the compound C₂H₈O ?

• 11
• 2
• 8
• 1

Tags

NGSS.MS-PS1-1

A positive ion is called

• A cation
• An anion
• A negative
• A postive