Which two particles should be fond in the center (nucleus) of a Bohr's model?

• Protons & Electrons

• Neutrons & Electrons

• Protons & Neutrons

• Protons only

Organize these options into the right categories

Groups:

(a) Elements

,

(b) Compounds

• Nitrogen (N₂)

• Carbon Dioxide (CO₂)

• Sodium Chloride (NaCl)

• Iron (Fe

• Ozone (O₃)

• Water (H₂O)

Tags

NGSS.MS-PS1-1

Which of the equations below SUPPORT the Law of Conservation of Mass?

• 6 CO₂ + 6 H₂O ----> C₆H₁₂O₆ + 6 O₂

• CO₂ + 6 H₂O ----> C₆H₁₂O₆ +

  6 CO₂

• CO₂ + H₂O ----> C₆H₁₂O₆ + CO₂

Tags

NGSS.MS-PS1-5

Study the diagram of the chemical reaction shown.

How many Hydrogen atoms are needed on the Product side of the equation to support the Law of Conservation of Mass?

• 6

• 8

• 2

• 4

Tags

NGSS.MS-PS1-5

If a chemical reaction takes place in a CLOSED SYSTEM, how would you describe the reaction?

• The mass of the product is equal to the mass of the reactant.

• The mass of the product is greater than the mass of the reactant.

• The mass of the reactant and product will vary depending on temperature.

• The mass of the reactant is greater then the mass of the product.

Tags

NGSS.MS-PS1-5

Which subatomic particle has a positive (+) charge?

• Neutron
• Proton
• Electron

True or False - Protons and Neutrons have about the same mass.

• True - They have about the same mass
• False - They do not have about the same mass

Which subatomic particle has a negative (-) charge?

• Proton
• Electron
• Neutron

Which subatomic particle has a neutral or no charge?

• Proton
• Electron
• Neutron

Where are the Electrons found in the structure of an atom?

• In the nucleus
• In spaces around the nucleus

Tags

NGSS.MS-PS1-1