Atomic Structure and the Periodic Table — Test

Question 1

Which pure substance can be classified as an element?

Revolt · Accepted Answer

cap h sub 2

Question 2

Which statement about Niels Bohr’s atomic model is true?

Revolt · Accepted Answer

Each orbit has a specific energy level.

Question 3

A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it?

Revolt · Accepted Answer

Na

Question 4

Iron, an element with the chemical symbol Fe , is an important element. It is used to make steel and is part of the substance that transports oxygen throughout the human body. Which statement about Fe is supported by the modern atomic theory but not John Dalton’s theory?

Revolt · Accepted Answer

The electrons of iron have probable locations in a region of space around the nucleus.

Question 5

Which best explains why ionization energy tends to decrease from the top to the bottom of a group?

Revolt · Accepted Answer

Electrons get farther from the nucleus.

Question 6

Which scientist is known for developing the planetary model of the atom?

Revolt · Accepted Answer

Niels Bohr

Question 7

Which physical method can be used for obtaining a sample of salt from a small beaker of salt water?

Revolt · Accepted Answer

boiling

Question 8

Which statement best describes how electrons fill orbitals in the periodic table?

Revolt · Accepted Answer

Electrons fill orbitals in order of their increasing energy from left to right.

Question 9

How many valence electrons does aluminum Al have available for bonding?

Revolt · Accepted Answer

3

Question 10

Which substance is a mixture?

Revolt · Accepted Answer

gasoline

Atomic Structure and the Periodic Table — Test Answers

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