8th Grade Science Review 11 (Periodic Table of Elements)

1.

Multiple Choice

1 min

1 pt

What is the biggest difference between an atom of cobalt (Co) and an atom of nickel (Ni) as shown in the periodic table entries?

An atom of nickel has more protons.

An atom of cobalt has more electrons.

An atom of cobalt has a lower number of neutrons.

An atom of nickel has a higher value for atomic mass.

2.

Multiple Choice

3 mins

1 pt

Charles needs a very lightweight metal. Use the periodic table to determine which he would choose.

silicon

magnesium

iondine

tungsten

3.

Multiple Choice

1 min

1 pt

In what order are the regions arranged on the periodic table, reading left to right?

inert gases, metals, nonmetals, metalloids

metalloids, metals, nonmetals, inert gases

metals, metalloids, nonmetals, inert gases

nonmetals, inert gases, metals, metalloids

4.

Multiple Choice

30 sec

1 pt

Fluorine, chlorine, bromine, iodine, and astatine make up Group 17, the halogens. Why are these elements grouped together?

They are all very reactive nonmetals with similar chemical properties.

They are all nonreactive gases with similar physical properties.

Their atoms all have eight electrons in their outer energy levels.

They all have the same atomic number.

5.

Multiple Choice

30 sec

1 pt

Which of the following best describes the properties of metals?

hard, brittle, and nonconductive

liquid, dark, and conductive

shiny, malleable, and conductive

soft, oily, and very reactive

6.

Multiple Choice

30 sec

1 pt

How are the elements in the periodic table arranged?

by their atomic mass

by their chemical symbol

by their chemical name

by their atomic number

7.

Multiple Choice

30 sec

1 pt

The graph above shows the densities in kilograms per cubic meter (kg/m3) of the elements in Period 2 of the periodic table. Given a 100m3 sample of each element in Period 2, which sample would have the greatest mass?

the sample of Aluminum (Al)

the sample of Chlorine (Cl)

the sample of Sulphur (S)

the sample of Argon (Ar)

8.

Multiple Choice

30 sec

1 pt

What does the number of electrons in the outer level indicate about the element?

how reactive the element is

how malleable the element is

how brittle the element is

how ductile the element is

9.

Multiple Choice

30 sec

1 pt

According to its location on the periodic table, sodium (Na) can be described as

an alkaline-earth metal.

a transition metal.

an alkali metal.

a metalloid.

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