Chem semester test

Changing this changes the element name

• protons
• neutrons
• electrons

Changing this changes the weight of an atom

• protons
• neutrons
• electrons
• protons and neutrons

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-8

Changing this may cause an isotope 

• protons
• neutrons and electrons
• neutrons
• electrons

Tags

NGSS.HS-PS1-8

_________ is what the researcher controls or changes during an experiment.

• Dependent

• Independent

• Direct

• Indirect

• N/A

_________ variable is what the researcher measures/collects data on. This is not controlled by the experimenter.

• Dependent

• Independent

• Direct

• Indirect

• N/A

Write the balanced skeleton equation for the following:

aluminum bromide and chlorine gas react to form aluminum chloride and bromine gas.

• 2 AlBr₃ + 3 Cl₂ -> 2 AlCl₃ + 3 Br₂

• AlBr₃ + 3 Cl -> AlCl₃ + 3 Br

• AlBr + Cl -> AlCl + Br

• 2 AlBr + Cl₂ -> 2 AlCl + Br₂

Tags

NGSS.HS-PS1-7

Which of these is a physical change?

• Modeling clay being shaped into a sculpture

• A forest fire

• Calcium chloride and water making heat when mixed together

• Acids turning an indicator pink

How many protons and electrons in the average atom of Xenon?

• 54 protons, 77 electrons

• 54 protons, 54 electrons

• 26 protons, 26 electrons

• 26 neutrons, 22 protons

Tags

NGSS.HS-PS1-1

Which of the following is a heterogeneous mixture? Choose all that apply.

• Water

• Fruit salad

• Lemonade

• Milk

What two particles are inside the nucleus of an atom?

• Protons and Neutrons
• Electrons and Protons
• Electrons and Neutrons
• all of them

Tags

NGSS.HS-PS1-8