Practice Test

Question 1

Which shows the electron configuration for Silicon Si ?

Revolt · Accepted Answer

D: Ne times 3 times s squared times 3 times p squared

Question 2

What was Johann Dobereiner’s contribution to the development of the periodic table?

Revolt · Accepted Answer

A: He identified triads of elements that had similar properties.

Question 3

What did J. J. Thomson observe when he applied electric voltage to a cathode ray tube in his famous experiment?

Revolt · Accepted Answer

D: The glass opposite of the negative electrode started to glow.

Question 4

Which is a set of valid quantum numbers?

Revolt · Accepted Answer

A: n is equal to 4 ,  l is equal to 3 ,  m is equal to 3

Question 5

Which diagram best illustrates the atomic model that Rutherford derived from his gold foil experiment?

Revolt · Accepted Answer

C: Image with description A small orange circle with seven plus signs is at the center of a larger dotted circle. Between the two circles are 7 small green circles, each labeled with a negative sign.

Question 6

To explain the photoelectric effect, Albert Einstein linked the photoelectric effect to an idea from which scientist?

Revolt · Accepted Answer

C: Max Planck

Question 7

What is the study of the spectra produced from the emission and absorption of electromagnetic radiation?

Revolt · Accepted Answer

B: spectroscopy

Question 8

Which is most likely true about electronegativity?

Revolt · Accepted Answer

B: It tends to increase across a period.

Question 9

Which physical method can separate a mixture of steel ball bearings and marbles?

Revolt · Accepted Answer

A: sorting

Question 10

A piece of sodium metal can be described as

Revolt · Accepted Answer

C: a pure substance and an element.

Practice Test Answers

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