Question 2

which components of the atom have a positive charge?

protons

electrons

neutrons

all components have a positive charge.

question 3

which component of the atom has the least mass?

protons

electrons

neutrons

all are the same size.

question 4

the identity of an element depends on the number of

protons in the atom.

electrons in the atom.

neutrons in the atom.

protons and neutrons in the nucleus.

question 5

what did rutherford contribute to the model of the atom?

the electron

the nucleus

the neutron

the proton

3. on your graph, the data points between the black squares are data for elements with atomic numbers 3 through 9. locate these elements on your periodic table. what term or description would you use to identify these elements with respect to the periodic table?

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.