A model of a neutral atom is shown. An atom of which element is best represented by this model?

• neon, Ne

• nitrogen, N

• Beryllium, Be

• lithium, Li

Which of the following determines the identity of an element?

• the number of protons

• the number of neutrons

• the arrangement of electrons

• the number of energy levels

The picture below represents an atom and its subatomic particles. Which letter in the picture represents an electron?

• W

• X

• Y

• Z

What is the atomic number of the neutral atom represented by the Periodic Table block above?

• 18

• 19

• 39

• 40

The model of the periodic table shows the location of four elements. A student is asked to identify the element that is a colorless gas and does not react with other elements. At which location in this periodic table would the element most likely be found?

• 1

• 2

• 3

• 4

A student tests an unknown substance for the following properties and finds the results listed in the table. Given this information, which of the following is the most reasonable conclusion for the student to reach?

• the substance is a metallic solid

• the substance is a nonmetallic solid

• the substance is a gas

• the substance is a liquid

As you move from left to right across the periodic table, characteristics of the elements change as well. Which is the correct sequence, moving from left to right?

• metalloid - metal - nonmetal

• metal - nonmetal - metalloid

• metal - metalloid - nonmetal

• nonmetal - metalloid - metal

Carbon and other nonmetals are found in which area of the periodic table?

• on the left-most side

• on the right side

• in the middle column of the periodic table

• in the bottom rows

Which of the following sets of elements would be good conductors of both heat & electricity?

• Cl, Br, I

• At, P, Se

• Fe, Cu, C

• Au, Ag, W

A student drew models of the atomic nuclei of four different atoms. Select TWO statements that describe the models correctly.

• Three of the depicted atomic nuclei have the same mass.

• The models show atomic nuclei of four different elements.

• Two of the models are of atomic nuclei of the same element.

• All of the models show a nucleus that has a positive charge.

• All of the models are missing the electrons that are part of every nucleus.